From d0dcdb51106d94880022358522261de276cd097d Mon Sep 17 00:00:00 2001
From: Sebastian Meyer <sebastian@informathekar.de>
Date: Tue, 26 Mar 2024 20:10:30 +0100
Subject: [PATCH] Update documentation

---
 .phpdoc/guide/changelog.rst                   |    7 +-
 .phpdoc/guide/index.rst                       |    5 +-
 .phpdoc/guide/overview/datastructures.rst     |   79 +
 .phpdoc/guide/overview/errorhandlers.rst      |   27 +
 .phpdoc/guide/overview/index.rst              |   14 +
 .phpdoc/guide/overview/interfaces.rst         |   35 +
 .phpdoc/guide/overview/traits.rst             |   78 +
 .phpdoc/guide/usage/index.rst                 |   12 +-
 .phpdoc/guide/usage/installation.rst          |    3 +
 .phpdoc/template/css/custom.css.twig          |   34 +
 .phpdoc/template/index.html.twig              |    8 +-
 ...s-Exceptions-InvalidDataTypeException.html |  396 ++++
 ...asics-DataStructures-StrictCollection.html |  597 +++---
 .../OCC-Basics-DataStructures-StrictList.html | 1684 ++--------------
 ...OCC-Basics-DataStructures-StrictQueue.html | 1765 ++---------------
 ...tructures-StrictSplDatastructureTrait.html | 1390 +++++++++++++
 ...OCC-Basics-DataStructures-StrictStack.html | 1735 ++--------------
 ...es-Traits-StrictSplDatastructureTrait.html | 1391 +++++++++++++
 ...ics-ErrorHandlers-ThrowErrorException.html |   18 +
 ...s-ErrorHandlers-TriggerExceptionError.html |   18 +
 ...CC-Basics-Interfaces-ArrayAccessTrait.html |   18 +
 .../OCC-Basics-Interfaces-CountableTrait.html |   18 +
 ...ics-Interfaces-IteratorAggregateTrait.html |   18 +
 .../OCC-Basics-Interfaces-IteratorTrait.html  |   18 +
 doc/classes/OCC-Basics-Traits-Getter.html     |   18 +
 .../OCC-Basics-Traits-OverloadingGetter.html  |   18 +
 .../OCC-Basics-Traits-OverloadingSetter.html  |   18 +
 doc/classes/OCC-Basics-Traits-Setter.html     |   18 +
 doc/classes/OCC-Basics-Traits-Singleton.html  |   18 +
 .../OCC-Basics-Traits-TypeChecker.html        |  644 ++++++
 doc/css/template.css                          |   34 +
 ...s-exceptions-invaliddatatypeexception.html |  362 ++++
 .../src-datastructures-strictcollection.html  |   18 +
 doc/files/src-datastructures-strictlist.html  |   18 +
 doc/files/src-datastructures-strictqueue.html |   18 +
 ...tructures-strictspldatastructuretrait.html |  362 ++++
 doc/files/src-datastructures-strictstack.html |   18 +
 ...es-traits-strictspldatastructuretrait.html |  362 ++++
 ...src-errorhandlers-throwerrorexception.html |   18 +
 ...c-errorhandlers-triggerexceptionerror.html |   18 +
 .../src-interfaces-arrayaccesstrait.html      |   18 +
 doc/files/src-interfaces-countabletrait.html  |   18 +
 ...src-interfaces-iteratoraggregatetrait.html |   18 +
 doc/files/src-interfaces-iteratortrait.html   |   18 +
 doc/files/src-traits-getter.html              |   18 +
 doc/files/src-traits-overloadinggetter.html   |   18 +
 doc/files/src-traits-overloadingsetter.html   |   18 +
 doc/files/src-traits-setter.html              |   18 +
 doc/files/src-traits-singleton.html           |   18 +
 doc/files/src-traits-typechecker.html         |  362 ++++
 .../InvalidDataTypeException.php.txt          |   39 +
 .../DataStructures/StrictCollection.php.txt   |  168 +-
 .../src/DataStructures/StrictList.php.txt     |  742 +------
 .../src/DataStructures/StrictQueue.php.txt    |  110 +-
 .../StrictSplDatastructureTrait.php.txt       |  420 ++++
 .../src/DataStructures/StrictStack.php.txt    |  103 +-
 .../StrictSplDatastructureTrait.php.txt       |  422 ++++
 doc/files/src/Traits/TypeChecker.php.txt      |  150 ++
 doc/graphs/classes.html                       |   18 +
 doc/guides/changelog.html                     |   34 +-
 doc/guides/index.html                         |   56 +-
 doc/guides/overview/datastructures.html       |  289 +++
 doc/guides/overview/errorhandlers.html        |  225 +++
 doc/guides/overview/index.html                |   76 +
 doc/guides/overview/interfaces.html           |  235 +++
 doc/guides/overview/traits.html               |  272 +++
 doc/guides/usage/index.html                   |   22 +
 doc/guides/usage/installation.html            |   24 +
 doc/guides/usage/requirements.html            |   18 +
 doc/index.html                                |   32 +-
 doc/indices/files.html                        |   21 +
 doc/js/searchIndex.js                         |  321 ++-
 doc/namespaces/default.html                   |   18 +
 .../occ-basics-datastructures-exceptions.html |  345 ++++
 .../occ-basics-datastructures-traits.html     |  345 ++++
 doc/namespaces/occ-basics-datastructures.html |   27 +
 doc/namespaces/occ-basics-errorhandlers.html  |   18 +
 doc/namespaces/occ-basics-interfaces.html     |   18 +
 doc/namespaces/occ-basics-traits.html         |   20 +-
 doc/namespaces/occ-basics.html                |   18 +
 doc/namespaces/occ.html                       |   18 +
 doc/packages/Basics-DataStructures.html       |   30 +-
 doc/packages/Basics-ErrorHandlers.html        |   18 +
 doc/packages/Basics-Interfaces.html           |   18 +
 doc/packages/Basics-Traits.html               |   20 +-
 doc/packages/Basics.html                      |   18 +
 doc/packages/default.html                     |   18 +
 doc/reports/deprecated.html                   |   18 +
 doc/reports/errors.html                       |   18 +
 doc/reports/markers.html                      |   18 +
 90 files changed, 10333 insertions(+), 6321 deletions(-)
 create mode 100644 .phpdoc/guide/overview/datastructures.rst
 create mode 100644 .phpdoc/guide/overview/errorhandlers.rst
 create mode 100644 .phpdoc/guide/overview/interfaces.rst
 create mode 100644 .phpdoc/guide/overview/traits.rst
 create mode 100644 doc/classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html
 create mode 100644 doc/classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html
 create mode 100644 doc/classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html
 create mode 100644 doc/classes/OCC-Basics-Traits-TypeChecker.html
 create mode 100644 doc/files/src-datastructures-exceptions-invaliddatatypeexception.html
 create mode 100644 doc/files/src-datastructures-strictspldatastructuretrait.html
 create mode 100644 doc/files/src-datastructures-traits-strictspldatastructuretrait.html
 create mode 100644 doc/files/src-traits-typechecker.html
 create mode 100644 doc/files/src/DataStructures/Exceptions/InvalidDataTypeException.php.txt
 create mode 100644 doc/files/src/DataStructures/StrictSplDatastructureTrait.php.txt
 create mode 100644 doc/files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt
 create mode 100644 doc/files/src/Traits/TypeChecker.php.txt
 create mode 100644 doc/guides/overview/datastructures.html
 create mode 100644 doc/guides/overview/errorhandlers.html
 create mode 100644 doc/guides/overview/interfaces.html
 create mode 100644 doc/guides/overview/traits.html
 create mode 100644 doc/namespaces/occ-basics-datastructures-exceptions.html
 create mode 100644 doc/namespaces/occ-basics-datastructures-traits.html

diff --git a/.phpdoc/guide/changelog.rst b/.phpdoc/guide/changelog.rst
index ab8d7be..d67317d 100644
--- a/.phpdoc/guide/changelog.rst
+++ b/.phpdoc/guide/changelog.rst
@@ -3,7 +3,8 @@
 Changelog
 #########
 
-.. contents::
+.. sidebar:: Table of Contents
+  .. contents::
 
 v2.0.0
 ======
@@ -39,7 +40,9 @@ v2.0.0
 * Added new error handler :php:class:`OCC\Basics\ErrorHandlers\TriggerExceptionError`
 * Added new trait :php:trait:`OCC\Basics\Traits\OverloadingGetter`
 * Added new trait :php:trait:`OCC\Basics\Traits\OverloadingSetter`
-* Extended API for all datastructures
+* Added new trait :php:trait:`OCC\Basics\Traits\TypeChecker`
+* Extended API for all datastructures (see :php:trait:`OCC\Basics\DataStructures\Traits\StrictSplDatastructureTrait`)
+* Introduced :php:class:`OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException` for strict datastructures
 * Extended `documentation <https://opencultureconsulting.github.io/php-basics/>`_
 
 v1.1.0
diff --git a/.phpdoc/guide/index.rst b/.phpdoc/guide/index.rst
index c2a08f9..15f3f49 100644
--- a/.phpdoc/guide/index.rst
+++ b/.phpdoc/guide/index.rst
@@ -3,11 +3,8 @@
 Documentation
 #############
 
-.. meta::
-  :layout: landingpage
-
 .. toctree::
-  :hidden:
+  :maxdepth: 2
 
   overview/index
   usage/index
diff --git a/.phpdoc/guide/overview/datastructures.rst b/.phpdoc/guide/overview/datastructures.rst
new file mode 100644
index 0000000..a8b1b05
--- /dev/null
+++ b/.phpdoc/guide/overview/datastructures.rst
@@ -0,0 +1,79 @@
+.. title:: Datastructures
+
+Typed Datastructures
+####################
+
+.. sidebar:: Table of Contents
+  .. contents::
+
+All datastructures in this package have in common that you can control the types of items they can hold.
+
+To restrict allowed data types for items, provide the constructor with an array of atomic types or fully qualified
+class names you want to allow as item types. Available atomic types are `array`, `bool`, `callable`, `countable`,
+`float` / `double`, `int` / `integer` / `long`, `iterable`, `null`, `numeric`, `object`, `resource`, `scalar` and
+`string`.
+
+Trying to add an item with a data type not on the list of allowed types to a strict datastructure will result in an
+:php:class:`OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException`.
+
+  Examples:
+
+  .. code-block:: php
+    // create a collection of strings
+    $stringCollection = new StrictCollection(['string']);
+
+    // create a queue of PSR-15 middlewares
+    $middlewareQueue = new StrictQueue(['Psr\Http\Server\MiddlewareInterface']);
+
+StrictCollection
+================
+
+.. sidebar:: API Documentation
+  :php:class:`OCC\Basics\DataStructures\StrictCollection`
+
+*A type-sensitive, unsorted collection of items.*
+
+Holds items as key/value pairs where keys identify the items and have to be valid array keys while values can be of any
+controlled type.
+
+A `StrictCollection` can be accessed like an array, but not traversed because it has no particular order. Technically
+speaking, `StrictCollection` implements `\ArrayAccess <https://www.php.net/arrayaccess>`_, `\Countable
+<https://www.php.net/countable>`_ and `\Serializable <https://www.php.net/serializable>`_, but no `\Traversable
+<https://www.php.net/traversable>`_ interface.
+
+.. note::
+  Internally it holds the items in the `$_data` array, the same as most :php:namespace:`OCC\Basics\Interfaces` and
+  :php:namespace:`OCC\Basics\Traits` of this package.
+
+StrictList
+==========
+
+.. sidebar:: API Documentation
+  :php:class:`OCC\Basics\DataStructures\StrictList`
+
+*A type-sensitive, taversable list of items.*
+
+Extends `\SplDoublyLinkedList <https://www.php.net/spldoublylinkedlist>`_ with an option to restrict the allowed data
+types for list items.
+
+StrictQueue
+===========
+
+.. sidebar:: API Documentation
+  :php:class:`OCC\Basics\DataStructures\StrictQueue`
+
+*A type-sensitive, taversable queue (FIFO) of items.*
+
+Extends `\SplDoublyLinkedList <https://www.php.net/spldoublylinkedlist>`_ with an option to restrict the allowed data
+types for list items.
+
+StrictStack
+===========
+
+.. sidebar:: API Documentation
+  :php:class:`OCC\Basics\DataStructures\StrictStack`
+
+*A type-sensitive, taversable stack (LIFO) of items.*
+
+Extends `\SplDoublyLinkedList <https://www.php.net/spldoublylinkedlist>`_ with an option to restrict the allowed data
+types for list items.
diff --git a/.phpdoc/guide/overview/errorhandlers.rst b/.phpdoc/guide/overview/errorhandlers.rst
new file mode 100644
index 0000000..eb82d53
--- /dev/null
+++ b/.phpdoc/guide/overview/errorhandlers.rst
@@ -0,0 +1,27 @@
+.. title:: Error Handlers
+
+Error and Exception Handlers
+############################
+
+.. sidebar:: Table of Contents
+  .. contents::
+
+ThrowErrorException
+===================
+
+Throws internal errors as exceptions.
+
+If registered as error handler, this converts an internal PHP error into an
+`ErrorException`. It respects the `error_reporting` directive.
+
+> Usage: `set_error_handler(new ThrowErrorException());`
+
+TriggerExceptionError
+=====================
+
+Triggers errors for uncaught exceptions.
+
+If registered as exception handler, this catches an uncaught exception and
+converts it into an internal PHP error of severity `E_USER_ERROR`.
+
+> Usage: `set_exception_handler(new TriggerExceptionError());`
diff --git a/.phpdoc/guide/overview/index.rst b/.phpdoc/guide/overview/index.rst
index abf0d2b..8dc9e06 100644
--- a/.phpdoc/guide/overview/index.rst
+++ b/.phpdoc/guide/overview/index.rst
@@ -2,3 +2,17 @@
 
 Overview
 ########
+
+The package currently contains classes for :doc:`datastructures`, :doc:`errorhandlers`, multiple :doc:`interfaces`, and
+more generic :doc:`traits` for common use cases. They share the same design principles like property and method naming
+schema, the highest coding standards of `PHPStan <https://phpstan.org/>`_ and `Psalm <https://psalm.dev/>`_, and full
+`PSR-12 <https://www.php-fig.org/psr/psr-12/>`_ compliance to make sure they can be combined and easily re-used in
+other projects.
+
+.. toctree::
+  :maxdepth: 2
+
+  datastructures
+  errorhandlers
+  interfaces
+  traits
diff --git a/.phpdoc/guide/overview/interfaces.rst b/.phpdoc/guide/overview/interfaces.rst
new file mode 100644
index 0000000..dcd8357
--- /dev/null
+++ b/.phpdoc/guide/overview/interfaces.rst
@@ -0,0 +1,35 @@
+.. title:: Interfaces
+
+Interface Traits
+################
+
+.. sidebar:: Table of Contents
+  .. contents::
+
+ArrayAccessTrait
+================
+
+A generic implementation of the ArrayAccess interface.
+
+Internally it accesses the protected `$_data` array.
+
+CountableTrait
+==============
+
+A generic implementation of the Countable interface.
+
+Internally it counts the values of the protected `$_data` array.
+
+IteratorAggregateTrait
+======================
+
+A generic implementation of the IteratorAggregate interface.
+
+Internally it iterates over the protected `$_data` array.
+
+IteratorTrait
+=============
+
+A generic implementation of the Iterator interface.
+
+Internally it iterates over the protected `$_data` array.
diff --git a/.phpdoc/guide/overview/traits.rst b/.phpdoc/guide/overview/traits.rst
new file mode 100644
index 0000000..462083d
--- /dev/null
+++ b/.phpdoc/guide/overview/traits.rst
@@ -0,0 +1,78 @@
+.. title:: Traits
+
+Traits
+######
+
+.. sidebar:: Table of Contents
+  .. contents::
+
+Getter
+======
+
+Reads data from inaccessible properties by using magic methods.
+
+To make a `protected` or `private` property readable, provide a method named
+`_magicGet{Property}()` which handles the reading. Replace `{Property}` in
+the method's name with the name of the actual property (with an uppercase
+first letter).
+
+> Example: If the property is named `$fooBar`, the "magic" method has to be
+> `_magicGetFooBar()`. This method is then called when `$fooBar` is read in
+> a context where it normally would not be accessible.
+
+OverloadingGetter
+=================
+
+Overloads a class with readable magic properties.
+
+Internally it reads the protected `$_data` array whose keys are interpreted
+as property names.
+
+> Example: Reading `Foo->bar` will return the value of `$_data['bar']`.
+
+OverloadingSetter
+=================
+
+Overloads a class with writable magic properties.
+
+Internally it writes the protected `$_data` array whose keys are interpreted
+as property names.
+
+> Example: `Foo->bar = 42;` will set `$_data['bar']` to `42`.
+
+Setter
+======
+
+Writes data to inaccessible properties by using magic methods.
+
+To make a `protected` or `private` property writable, provide a method named
+`_magicSet{Property}()` which handles the writing. Replace `{Property}` in
+the method's name with the name of the actual property (with an uppercase
+first letter).
+
+> Example: If the property is named `$fooBar`, the "magic" method has to be
+> `_magicSetFooBar()`. This method is then called when `$fooBar` is written
+> to in a context where it normally would not be accessible.
+
+Singleton
+=========
+
+Allows just a single instance of the class using this trait.
+
+Get the singleton by calling the static method `getInstance()`.
+
+If there is no object yet, the constructor is called with the same arguments
+as `getInstance()`. Any later call will just return the already instantiated
+object (irrespective of the given arguments).
+
+In order for this to work as expected, the constructor has to be implemented
+as `private` to prevent direct instantiation of the class.
+
+TypeChecker
+===========
+
+A generic data type checker.
+
+This allows to set a list of allowed atomic data types and fully qualified
+class names. It also provides a method to check if a value's data type matches
+at least one of these types.
diff --git a/.phpdoc/guide/usage/index.rst b/.phpdoc/guide/usage/index.rst
index 1ce6e10..831e95d 100644
--- a/.phpdoc/guide/usage/index.rst
+++ b/.phpdoc/guide/usage/index.rst
@@ -3,8 +3,12 @@
 User Guide
 ##########
 
-.. toctree::
-    :maxdepth: 2
+The *PHP Basics* are a library package, not a stand-alone application. The following documentation of requirements and
+installation procedures describes how to make use of the classes and traits within your own application. For a detailed
+description of the package's contents have a look at the :doc:`../overview/index` page.
 
-    requirements
-    installation
+.. toctree::
+  :maxdepth: 2
+
+  requirements
+  installation
diff --git a/.phpdoc/guide/usage/installation.rst b/.phpdoc/guide/usage/installation.rst
index ad96dc2..9ccec9a 100644
--- a/.phpdoc/guide/usage/installation.rst
+++ b/.phpdoc/guide/usage/installation.rst
@@ -3,6 +3,9 @@
 Installation
 ############
 
+.. sidebar:: Table of Contents
+  .. contents::
+
 Composer
 ========
 
diff --git a/.phpdoc/template/css/custom.css.twig b/.phpdoc/template/css/custom.css.twig
index 5dc7e98..e6320d0 100644
--- a/.phpdoc/template/css/custom.css.twig
+++ b/.phpdoc/template/css/custom.css.twig
@@ -40,6 +40,8 @@ aside.phpdocumentor-sidebar
     padding: 0 var(--spacing-md) !important;
 }
 
+p > code,
+li > code,
 code.prettyprint
 {
     background-color: var(--code-background-color);
@@ -50,6 +52,38 @@ code.prettyprint
     padding: var(--spacing-xxxs);
 }
 
+@media (max-width: 999px) {
+div.admonition-wrapper
+{
+    display: none;
+}
+}
+
+@media (min-width: 1000px) {
+div.admonition-wrapper
+{
+    display: block;
+    float: right;
+    padding: var(--spacing-md);
+    margin: 0 0 var(--spacing-md) var(--spacing-md);
+    width: auto;
+    font-size: var(--text-sm);
+    border: 1px solid var(--primary-color-lighten);
+}
+}
+
+div.admonition-wrapper
+    p.sidebar-title
+{
+    font-weight: bold;
+}
+
+div.contents
+    ul.phpdocumentor-list
+{
+    margin-bottom: 0;
+}
+
 div.phpdocumentor-content
     div.section
         ul
diff --git a/.phpdoc/template/index.html.twig b/.phpdoc/template/index.html.twig
index 3c519ac..01d4ee9 100644
--- a/.phpdoc/template/index.html.twig
+++ b/.phpdoc/template/index.html.twig
@@ -10,10 +10,10 @@
 
     <p class="phpdocumentor-summary">A collection of generic classes and useful traits for PHP projects.</p>
 
-    <p>The package currently contains classes for <a href="packages/Basics-DataStructures.html">type-sensitive
-    data structures</a>, <a href="packages/Basics-ErrorHandlers.html">error and exception handlers</a>, multiple
-    <a href="packages/Basics-Interfaces.html">traits implementing standard interfaces</a>, and more generic
-    <a href="packages/Basics-Traits.html">traits for common use cases</a>. They share the same design principles
+    <p>The package currently contains classes for <a href="guides/overview/datastructures.html">type-sensitive
+    data structures</a>, <a href="guides/overview/errorhandlers.html">error and exception handlers</a>, multiple
+    <a href="guides/overview/interfaces.html">traits implementing standard interfaces</a>, and more generic
+    <a href="guides/overview/traits.html">traits for common use cases</a>. They share the same design principles
     like property and method naming schema, highest coding standards of <a href="https://phpstan.org/">PHPStan</a>
     and <a href="https://psalm.dev/">Psalm</a>, and full <a href="https://www.php-fig.org/psr/psr-12/">PSR-12</a>
     compliance to make sure they can be combined and easily re-used in other projects.</p>
diff --git a/doc/classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html b/doc/classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html
new file mode 100644
index 0000000..f38cfb6
--- /dev/null
+++ b/doc/classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html
@@ -0,0 +1,396 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PHP Basics</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PHP Basics</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
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+                
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+    </section>
+</aside>
+
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+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ.html">OCC</a></li>
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+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ-basics-datastructures.html">DataStructures</a></li>
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ-basics-datastructures-exceptions.html">Exceptions</a></li>
+    </ul>
+
+    <article class="phpdocumentor-element -class">
+        <h2 class="phpdocumentor-content__title">
+    InvalidDataTypeException
+
+        <span class="phpdocumentor-element__extends">
+        extends <abbr title="\DomainException">DomainException</abbr>
+    </span>
+    
+            <div class="phpdocumentor-element__package">
+            in package
+            <ul class="phpdocumentor-breadcrumbs">
+                                    <li class="phpdocumentor-breadcrumb"><a href="packages/Basics.html">Basics</a></li>
+                                    <li class="phpdocumentor-breadcrumb"><a href="packages/Basics-DataStructures.html">DataStructures</a></li>
+                            </ul>
+        </div>
+    
+    
+    </h2>
+
+<div class="phpdocumentor-label-line">
+
+
+</div>
+
+        <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Exceptions/InvalidDataTypeException.php"><a href="files/src-datastructures-exceptions-invaliddatatypeexception.html"><abbr title="src/DataStructures/Exceptions/InvalidDataTypeException.php">InvalidDataTypeException.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">37</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html#source-view.37" class="phpdocumentor-element-found-in__source" data-line="37" data-modal="source-view" data-src="files/src/DataStructures/Exceptions/InvalidDataTypeException.php.txt"></a>
+    </aside>
+
+            <p class="phpdocumentor-summary">Common exception for type-sensitive datastructures.</p>
+
+    <section class="phpdocumentor-description"><p>Exception thrown if a value does not adhere to the defined list of valid
+data types.</p>
+</section>
+
+
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">author</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                                
+                                                 <section class="phpdocumentor-description"><p>Sebastian Meyer <a href="mailto:sebastian.meyer@opencultureconsulting.com">sebastian.meyer@opencultureconsulting.com</a></p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+
+
+<h3 id="toc">
+    Table of Contents
+    <a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+        
+
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+
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+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
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+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="files/src/DataStructures/Exceptions/InvalidDataTypeException.php.txt" class="language-php line-numbers linkable-line-numbers"></pre>
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+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
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+                            Prism.highlightElement(code);
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+                    };
+
+                    xhr.send(null);
+                });
+            }
+
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+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
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+                            event.preventDefault();
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+                <section class="phpdocumentor-on-this-page__sidebar">
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+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                            </ul>
+            </li>
+            
+            
+                    </ul>
+    </section>
+
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+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
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+</body>
+</html>
diff --git a/doc/classes/OCC-Basics-DataStructures-StrictCollection.html b/doc/classes/OCC-Basics-DataStructures-StrictCollection.html
index a73c5a9..e724b8b 100644
--- a/doc/classes/OCC-Basics-DataStructures-StrictCollection.html
+++ b/doc/classes/OCC-Basics-DataStructures-StrictCollection.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -175,7 +193,7 @@
     
             <span class="phpdocumentor-element__extends">
             Uses
-                            <a href="classes/OCC-Basics-Interfaces-ArrayAccessTrait.html"><abbr title="\OCC\Basics\Interfaces\ArrayAccessTrait">ArrayAccessTrait</abbr></a>,                             <a href="classes/OCC-Basics-Interfaces-CountableTrait.html"><abbr title="\OCC\Basics\Interfaces\CountableTrait">CountableTrait</abbr></a>,                             <a href="classes/OCC-Basics-Traits-Getter.html"><abbr title="\OCC\Basics\Traits\Getter">Getter</abbr></a>                    </span>
+                            <a href="classes/OCC-Basics-Interfaces-ArrayAccessTrait.html"><abbr title="\OCC\Basics\Interfaces\ArrayAccessTrait">ArrayAccessTrait</abbr></a>,                             <a href="classes/OCC-Basics-Interfaces-CountableTrait.html"><abbr title="\OCC\Basics\Interfaces\CountableTrait">CountableTrait</abbr></a>,                             <a href="classes/OCC-Basics-Traits-TypeChecker.html"><abbr title="\OCC\Basics\Traits\TypeChecker">TypeChecker</abbr></a>                    </span>
     </h2>
 
 <div class="phpdocumentor-label-line">
@@ -186,9 +204,9 @@
         <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">83</span>
+    <span class="phpdocumentor-element-found-in__line">63</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.83" class="phpdocumentor-element-found-in__source" data-line="83" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.63" class="phpdocumentor-element-found-in__source" data-line="63" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
             <p class="phpdocumentor-summary">A type-sensitive, unsorted collection.</p>
@@ -250,19 +268,6 @@ names.</p>
 
 
 
-<h4 id="toc-properties">
-    Properties
-    <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#toc-properties" class="headerlink"><i class="fas fa-link"></i></a>
-
-</h4>
-<dl class="phpdocumentor-table-of-contents">
-            <dt class="phpdocumentor-table-of-contents__entry -property -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#property_allowedTypes">$allowedTypes</a>
-    <span>
-                        &nbsp;: array&lt;string|int, string&gt;            </span>
-</dt>
-
-    </dl>
 
 <h4 id="toc-methods">
     Methods
@@ -277,26 +282,12 @@ names.</p>
 </dt>
 <dd>Create a type-sensitive collection of items.</dd>
 
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-Traits-Getter.html#method___get">__get()</a>
-    <span>
-                                &nbsp;: mixed    </span>
-</dt>
-<dd>Read data from an inaccessible property.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-Traits-Getter.html#method___isset">__isset()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if an inaccessible property is set and not empty.</dd>
-
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
     <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_add">add()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
-<dd>Add/insert a new item at the specified index.</dd>
+<dd>Add/insert a item at the specified index.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
     <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_clear">clear()</a>
@@ -315,23 +306,30 @@ names.</p>
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
     <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_get">get()</a>
     <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>|null    </span>
+                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
 </dt>
 <dd>Get the item at the specified index.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_getAllowedTypes">getAllowedTypes()</a>
+    <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_getAllowedTypes">getAllowedTypes()</a>
     <span>
                                 &nbsp;: array&lt;string|int, string&gt;    </span>
 </dt>
-<dd>Get allowed data types for collection items.</dd>
+<dd>Get allowed data types.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_isAllowedType">isAllowedType()</a>
+    <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_hasAllowedType">hasAllowedType()</a>
     <span>
                                 &nbsp;: bool    </span>
 </dt>
-<dd>Check if the item&#039;s data type is allowed in the collection.</dd>
+<dd>Check if a value&#039;s data type is allowed.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_isAllowedType">isAllowedType()</a>
+    <span>
+                                &nbsp;: bool    </span>
+</dt>
+<dd>Check if a data type is allowed.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
     <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_isEmpty">isEmpty()</a>
@@ -396,6 +394,13 @@ names.</p>
 </dt>
 <dd>Set an item at the specified index.</dd>
 
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_setAllowedTypes">setAllowedTypes()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Set allowed data types.</dd>
+
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
     <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_toArray">toArray()</a>
     <span>
@@ -417,13 +422,6 @@ names.</p>
 </dt>
 <dd>Restore $this from string representation.</dd>
 
-            <dt class="phpdocumentor-table-of-contents__entry -method -protected">
-    <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_setAllowedTypes">setAllowedTypes()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Set allowed data types of collection items.</dd>
-
     </dl>
 
 
@@ -432,49 +430,6 @@ names.</p>
         
 
         
-    <section class="phpdocumentor-properties">
-        <h3 class="phpdocumentor-elements__header" id="properties">
-            Properties
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#properties" class="headerlink"><i class="fas fa-link"></i></a>
-
-        </h3>
-                    <article
-        class="
-            phpdocumentor-element
-            -property
-            -public
-                                                -read-only        "
->
-    <h4 class="phpdocumentor-element__name" id="property_allowedTypes">
-        $allowedTypes
-        <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#property_allowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
-
-        <span class="phpdocumentor-element__modifiers">
-                        <small class="phpdocumentor-element__modifier">read-only</small>        </span>
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">0</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.0" class="phpdocumentor-element-found-in__source" data-line="0" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
-    </aside>
-
-    
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-        <span class="phpdocumentor-signature__type">array&lt;string|int, string&gt;</span>
-    <span class="phpdocumentor-signature__name">$allowedTypes</span>
-    </code>
-
-        <section class="phpdocumentor-description"><p>The allowed data types for items.</p>
-</section>
-
-    
-    
-
-</article>
-            </section>
 
             <section class="phpdocumentor-methods">
         <h3 class="phpdocumentor-elements__header" id="methods">
@@ -496,9 +451,9 @@ names.</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">401</span>
+    <span class="phpdocumentor-element-found-in__line">325</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.401" class="phpdocumentor-element-found-in__source" data-line="401" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.325" class="phpdocumentor-element-found-in__source" data-line="325" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Create a type-sensitive collection of items.</p>
@@ -560,129 +515,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method___get">
-        __get()
-        <a href="classes/OCC-Basics-Traits-Getter.html#method___get" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/Getter.php"><a href="files/src-traits-getter.html"><abbr title="src/Traits/Getter.php">Getter.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">60</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.60" class="phpdocumentor-element-found-in__source" data-line="60" data-modal="source-view" data-src="files/src/Traits/Getter.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Read data from an inaccessible property.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">__get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">string&nbsp;</span><span class="phpdocumentor-signature__argument__name">$property</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">mixed</span></code>
-
-    <div class="phpdocumentor-label-line">
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$property</span>
-                : <span class="phpdocumentor-signature__argument__return-type">string</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The class property to get</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-Traits-Getter.html#method___get#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the property or getter method do not exist</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">mixed</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The class property's current value</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method___isset">
-        __isset()
-        <a href="classes/OCC-Basics-Traits-Getter.html#method___isset" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/Getter.php"><a href="files/src-traits-getter.html"><abbr title="src/Traits/Getter.php">Getter.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">83</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.83" class="phpdocumentor-element-found-in__source" data-line="83" data-modal="source-view" data-src="files/src/Traits/Getter.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if an inaccessible property is set and not empty.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">__isset</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">string&nbsp;</span><span class="phpdocumentor-signature__argument__name">$property</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$property</span>
-                : <span class="phpdocumentor-signature__argument__return-type">string</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The class property to check</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the class property is set and not empty</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -698,12 +530,12 @@ Possible values are:</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">121</span>
+    <span class="phpdocumentor-element-found-in__line">94</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.121" class="phpdocumentor-element-found-in__source" data-line="121" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.94" class="phpdocumentor-element-found-in__source" data-line="94" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
-        <p class="phpdocumentor-summary">Add/insert a new item at the specified index.</p>
+        <p class="phpdocumentor-summary">Add/insert a item at the specified index.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
@@ -721,7 +553,7 @@ Possible values are:</p>
                 : <span class="phpdocumentor-signature__argument__return-type">string|int</span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The new item's index</p>
+                    <section class="phpdocumentor-description"><p>The item's index</p>
 </section>
 
             </dd>
@@ -730,7 +562,7 @@ Possible values are:</p>
                 : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The new item</p>
+                    <section class="phpdocumentor-description"><p>The item</p>
 </section>
 
             </dd>
@@ -747,9 +579,9 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
-                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$offset</code> is not of allowed type</p>
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
 
                                     </dd>
@@ -771,9 +603,9 @@ Possible values are:</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">133</span>
+    <span class="phpdocumentor-element-found-in__line">106</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.133" class="phpdocumentor-element-found-in__source" data-line="133" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.106" class="phpdocumentor-element-found-in__source" data-line="106" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Clear the collection of any items.</p>
@@ -849,16 +681,16 @@ Possible values are:</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">147</span>
+    <span class="phpdocumentor-element-found-in__line">122</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.147" class="phpdocumentor-element-found-in__source" data-line="147" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.122" class="phpdocumentor-element-found-in__source" data-line="122" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Get the item at the specified index.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">string|int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>|null</span></code>
+                    <span class="phpdocumentor-signature__name">get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">string|int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -879,12 +711,29 @@ Possible values are:</p>
             </dl>
 
     
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_get#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
+</section>
+
+                                    </dd>
+                                            </dl>
 
             <section>
         <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>|null</span>
+        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
                     &mdash;
-                <section class="phpdocumentor-description"><p>The item or NULL if key is invalid</p>
+                <section class="phpdocumentor-description"><p>The item</p>
 </section>
 
             </section>
@@ -898,18 +747,18 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_getAllowedTypes">
         getAllowedTypes()
-        <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_getAllowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_getAllowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/TypeChecker.php"><a href="files/src-traits-typechecker.html"><abbr title="src/Traits/TypeChecker.php">TypeChecker.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">159</span>
+    <span class="phpdocumentor-element-found-in__line">83</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.159" class="phpdocumentor-element-found-in__source" data-line="159" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.83" class="phpdocumentor-element-found-in__source" data-line="83" data-modal="source-view" data-src="files/src/Traits/TypeChecker.php.txt"></a>
     </aside>
 
-        <p class="phpdocumentor-summary">Get allowed data types for collection items.</p>
+        <p class="phpdocumentor-summary">Get allowed data types.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
@@ -939,24 +788,24 @@ Possible values are:</p>
             -public
                                                         "
 >
-    <h4 class="phpdocumentor-element__name" id="method_isAllowedType">
-        isAllowedType()
-        <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_isAllowedType" class="headerlink"><i class="fas fa-link"></i></a>
+    <h4 class="phpdocumentor-element__name" id="method_hasAllowedType">
+        hasAllowedType()
+        <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_hasAllowedType" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/TypeChecker.php"><a href="files/src-traits-typechecker.html"><abbr title="src/Traits/TypeChecker.php">TypeChecker.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">173</span>
+    <span class="phpdocumentor-element-found-in__line">97</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.173" class="phpdocumentor-element-found-in__source" data-line="173" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.97" class="phpdocumentor-element-found-in__source" data-line="97" data-modal="source-view" data-src="files/src/Traits/TypeChecker.php.txt"></a>
     </aside>
 
-        <p class="phpdocumentor-summary">Check if the item&#039;s data type is allowed in the collection.</p>
+        <p class="phpdocumentor-summary">Check if a value&#039;s data type is allowed.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">isAllowedType</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
+                    <span class="phpdocumentor-signature__name">hasAllowedType</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">mixed&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -967,10 +816,10 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type">mixed</span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The item to check</p>
+                    <section class="phpdocumentor-description"><p>The value to check</p>
 </section>
 
             </dd>
@@ -982,7 +831,62 @@ Possible values are:</p>
         <h5 class="phpdocumentor-return-value__heading">Return values</h5>
         <span class="phpdocumentor-signature__response_type">bool</span>
                     &mdash;
-                <section class="phpdocumentor-description"><p>Whether the item's data type is allowed</p>
+                <section class="phpdocumentor-description"><p>Whether the value's data type is allowed</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_isAllowedType">
+        isAllowedType()
+        <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_isAllowedType" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/TypeChecker.php"><a href="files/src-traits-typechecker.html"><abbr title="src/Traits/TypeChecker.php">TypeChecker.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">125</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.125" class="phpdocumentor-element-found-in__source" data-line="125" data-modal="source-view" data-src="files/src/Traits/TypeChecker.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Check if a data type is allowed.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">isAllowedType</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">string&nbsp;</span><span class="phpdocumentor-signature__argument__name">$type</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$type</span>
+                : <span class="phpdocumentor-signature__argument__return-type">string</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The type to check</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type">bool</span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>Whether the data type is allowed</p>
 </section>
 
             </section>
@@ -1002,9 +906,9 @@ Possible values are:</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">199</span>
+    <span class="phpdocumentor-element-found-in__line">144</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.199" class="phpdocumentor-element-found-in__source" data-line="199" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.144" class="phpdocumentor-element-found-in__source" data-line="144" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Check if collection is empty.</p>
@@ -1045,9 +949,9 @@ Possible values are:</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">216</span>
+    <span class="phpdocumentor-element-found-in__line">161</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.216" class="phpdocumentor-element-found-in__source" data-line="216" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.161" class="phpdocumentor-element-found-in__source" data-line="161" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Check if this collection can be considered a list.</p>
@@ -1216,9 +1120,9 @@ from <code class="prettyprint">0</code>.</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">233</span>
+    <span class="phpdocumentor-element-found-in__line">179</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.233" class="phpdocumentor-element-found-in__source" data-line="233" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.179" class="phpdocumentor-element-found-in__source" data-line="179" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Set the item at the specified offset.</p>
@@ -1264,10 +1168,20 @@ from <code class="prettyprint">0</code>.</p>
                                     <dt class="phpdocumentor-tag-list__entry">
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                            <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
                 <dd class="phpdocumentor-tag-list__definition">
                                                                 <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
                                                             
-                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$offset</code> or <code class="prettyprint">$value</code> is not of allowed type</p>
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$offset</code> is not a valid array key</p>
 </section>
 
                                     </dd>
@@ -1336,9 +1250,9 @@ from <code class="prettyprint">0</code>.</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">263</span>
+    <span class="phpdocumentor-element-found-in__line">211</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.263" class="phpdocumentor-element-found-in__source" data-line="263" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.211" class="phpdocumentor-element-found-in__source" data-line="211" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Remove an item from the collection.</p>
@@ -1366,6 +1280,23 @@ from <code class="prettyprint">0</code>.</p>
             </dl>
 
     
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_remove#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
+</section>
+
+                                    </dd>
+                                            </dl>
 
     
 </article>
@@ -1383,9 +1314,9 @@ from <code class="prettyprint">0</code>.</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">273</span>
+    <span class="phpdocumentor-element-found-in__line">229</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.273" class="phpdocumentor-element-found-in__source" data-line="273" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.229" class="phpdocumentor-element-found-in__source" data-line="229" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Get string representation of $this.</p>
@@ -1424,9 +1355,9 @@ from <code class="prettyprint">0</code>.</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">290</span>
+    <span class="phpdocumentor-element-found-in__line">246</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.290" class="phpdocumentor-element-found-in__source" data-line="290" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.246" class="phpdocumentor-element-found-in__source" data-line="246" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Set an item at the specified index.</p>
@@ -1473,7 +1404,7 @@ from <code class="prettyprint">0</code>.</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -1482,6 +1413,70 @@ from <code class="prettyprint">0</code>.</p>
                                             </dl>
 
     
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_setAllowedTypes">
+        setAllowedTypes()
+        <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_setAllowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/TypeChecker.php"><a href="files/src-traits-typechecker.html"><abbr title="src/Traits/TypeChecker.php">TypeChecker.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">141</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.141" class="phpdocumentor-element-found-in__source" data-line="141" data-modal="source-view" data-src="files/src/Traits/TypeChecker.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Set allowed data types.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">setAllowedTypes</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;&nbsp;</span><span class="phpdocumentor-signature__argument__name">$allowedTypes</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">[]</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$allowedTypes</span>
+                : <span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;</span>
+                 = <span class="phpdocumentor-signature__argument__default-value">[]</span>            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>Allowed data types</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_setAllowedTypes#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if any value of <code class="prettyprint">$allowedTypes</code> is not a string</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
 </article>
                     <article
         class="phpdocumentor-element
@@ -1497,9 +1492,9 @@ from <code class="prettyprint">0</code>.</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">321</span>
+    <span class="phpdocumentor-element-found-in__line">258</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.321" class="phpdocumentor-element-found-in__source" data-line="321" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.258" class="phpdocumentor-element-found-in__source" data-line="258" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Return array representation of collection.</p>
@@ -1540,9 +1535,9 @@ from <code class="prettyprint">0</code>.</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">337</span>
+    <span class="phpdocumentor-element-found-in__line">274</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.337" class="phpdocumentor-element-found-in__source" data-line="337" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.274" class="phpdocumentor-element-found-in__source" data-line="274" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Turn collection into a type-sensitive list.</p>
@@ -1608,9 +1603,9 @@ from <code class="prettyprint">0</code>.</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">357</span>
+    <span class="phpdocumentor-element-found-in__line">293</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.357" class="phpdocumentor-element-found-in__source" data-line="357" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.293" class="phpdocumentor-element-found-in__source" data-line="293" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Restore $this from string representation.</p>
@@ -1638,68 +1633,6 @@ from <code class="prettyprint">0</code>.</p>
     
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -protected
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_setAllowedTypes">
-        setAllowedTypes()
-        <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_setAllowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictCollection.php"><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">304</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#source-view.304" class="phpdocumentor-element-found-in__source" data-line="304" data-modal="source-view" data-src="files/src/DataStructures/StrictCollection.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Set allowed data types of collection items.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">protected</span>
-                    <span class="phpdocumentor-signature__name">setAllowedTypes</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;&nbsp;</span><span class="phpdocumentor-signature__argument__name">$allowedTypes</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">[]</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$allowedTypes</span>
-                : <span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;</span>
-                 = <span class="phpdocumentor-signature__argument__default-value">[]</span>            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>Allowed data types of items</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_setAllowedTypes#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if any value of <code class="prettyprint">$allowedTypes</code> is not a string</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-    
 </article>
             </section>
 
@@ -1806,30 +1739,22 @@ from <code class="prettyprint">0</code>.</p>
             <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
             <li>
                 <ul class="phpdocumentor-list -clean">
-                                                            <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#toc-properties">Properties</a></li>
-                                                            <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#toc-methods">Methods</a></li>
+                                                                                <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#toc-methods">Methods</a></li>
                                     </ul>
             </li>
             
-                            <li class="phpdocumentor-on-this-page-section__title">Properties</li>
-                <li>
-                    <ul class="phpdocumentor-list -clean">
-                                                    <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#property_allowedTypes">$allowedTypes<a href="classes/OCC-Basics-DataStructures-StrictCollection.html"></li>
-                                            </ul>
-                </li>
             
                         <li class="phpdocumentor-on-this-page-section__title">Methods</li>
             <li>
                 <ul class="phpdocumentor-list -clean">
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method___construct">__construct()</a></li>
-                                            <li><a href="classes/OCC-Basics-Traits-Getter.html#method___get">__get()</a></li>
-                                            <li><a href="classes/OCC-Basics-Traits-Getter.html#method___isset">__isset()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_add">add()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_clear">clear()</a></li>
                                             <li><a href="classes/OCC-Basics-Interfaces-CountableTrait.html#method_count">count()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_get">get()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_getAllowedTypes">getAllowedTypes()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_isAllowedType">isAllowedType()</a></li>
+                                            <li><a href="classes/OCC-Basics-Traits-TypeChecker.html#method_getAllowedTypes">getAllowedTypes()</a></li>
+                                            <li><a href="classes/OCC-Basics-Traits-TypeChecker.html#method_hasAllowedType">hasAllowedType()</a></li>
+                                            <li><a href="classes/OCC-Basics-Traits-TypeChecker.html#method_isAllowedType">isAllowedType()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_isEmpty">isEmpty()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_isList">isList()</a></li>
                                             <li><a href="classes/OCC-Basics-Interfaces-ArrayAccessTrait.html#method_offsetExists">offsetExists()</a></li>
@@ -1839,10 +1764,10 @@ from <code class="prettyprint">0</code>.</p>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_remove">remove()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_serialize">serialize()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_set">set()</a></li>
+                                            <li><a href="classes/OCC-Basics-Traits-TypeChecker.html#method_setAllowedTypes">setAllowedTypes()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_toArray">toArray()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_toStrictList">toStrictList()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_unserialize">unserialize()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictCollection.html#method_setAllowedTypes">setAllowedTypes()</a></li>
                                     </ul>
             </li>
                     </ul>
diff --git a/doc/classes/OCC-Basics-DataStructures-StrictList.html b/doc/classes/OCC-Basics-DataStructures-StrictList.html
index 72bc23b..efe5989 100644
--- a/doc/classes/OCC-Basics-DataStructures-StrictList.html
+++ b/doc/classes/OCC-Basics-DataStructures-StrictList.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -172,13 +190,10 @@
                             </ul>
         </div>
     
-            <span class="phpdocumentor-element__implements">
-            implements
-                            <abbr title="\ArrayAccess">ArrayAccess</abbr>,                             <abbr title="\Countable">Countable</abbr>,                             <abbr title="\Iterator">Iterator</abbr>,                             <abbr title="\Serializable">Serializable</abbr>                    </span>
     
             <span class="phpdocumentor-element__extends">
             Uses
-                            <a href="classes/OCC-Basics-Traits-Getter.html"><abbr title="\OCC\Basics\Traits\Getter">Getter</abbr></a>                    </span>
+                            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html"><abbr title="\OCC\Basics\DataStructures\Traits\StrictSplDatastructureTrait">StrictSplDatastructureTrait</abbr></a>                    </span>
     </h2>
 
 <div class="phpdocumentor-label-line">
@@ -189,9 +204,9 @@
         <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">86</span>
+    <span class="phpdocumentor-element-found-in__line">44</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.86" class="phpdocumentor-element-found-in__source" data-line="86" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.44" class="phpdocumentor-element-found-in__source" data-line="44" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
     </aside>
 
             <p class="phpdocumentor-summary">A type-sensitive, taversable list.</p>
@@ -238,32 +253,12 @@ constructor with an array of atomic types or fully qualified class names.</p>
 
 
 
-    <h4 id="toc-interfaces">
-        Interfaces
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#toc-interfaces" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <dl class="phpdocumentor-table-of-contents">
-                    <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\ArrayAccess">ArrayAccess</abbr></dt>            <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\Countable">Countable</abbr></dt>            <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\Iterator">Iterator</abbr></dt>            <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\Serializable">Serializable</abbr></dt>    </dl>
 
 
 
 
 
 
-<h4 id="toc-properties">
-    Properties
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#toc-properties" class="headerlink"><i class="fas fa-link"></i></a>
-
-</h4>
-<dl class="phpdocumentor-table-of-contents">
-            <dt class="phpdocumentor-table-of-contents__entry -property -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#property_allowedTypes">$allowedTypes</a>
-    <span>
-                        &nbsp;: array&lt;string|int, string&gt;            </span>
-</dt>
-
-    </dl>
 
 <h4 id="toc-methods">
     Methods
@@ -272,257 +267,103 @@ constructor with an array of atomic types or fully qualified class names.</p>
 </h4>
 <dl class="phpdocumentor-table-of-contents">
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method___construct">__construct()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct">__construct()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Create a type-sensitive, traversable list of items.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-Traits-Getter.html#method___get">__get()</a>
-    <span>
-                                &nbsp;: mixed    </span>
-</dt>
-<dd>Read data from an inaccessible property.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-Traits-Getter.html#method___isset">__isset()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if an inaccessible property is set and not empty.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_add">add()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add">add()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Add/insert a new item at the specified offset.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_append">append()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append">append()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Append items at the end of the list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_bottom">bottom()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Peek at the item at the beginning of the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_clear">clear()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear">clear()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Clear the list of any items.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_count">count()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get">get()</a>
     <span>
-                                &nbsp;: int    </span>
-</dt>
-<dd>Get the number of items on the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_current">current()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Get the current list item.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_get">get()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
+                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>    </span>
 </dt>
 <dd>Get the item at the specified index.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getAllowedTypes">getAllowedTypes()</a>
-    <span>
-                                &nbsp;: array&lt;string|int, string&gt;    </span>
-</dt>
-<dd>Get allowed data types for list items.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getIteratorMode">getIteratorMode()</a>
-    <span>
-                                &nbsp;: int    </span>
-</dt>
-<dd>Get the mode of iteration.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isAllowedType">isAllowedType()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if the item&#039;s data type is allowed on the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isEmpty">isEmpty()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if list is empty.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isList">isList()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList">isList()</a>
     <span>
                                 &nbsp;: true    </span>
 </dt>
 <dd>Check if this can be considered a list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_key">key()</a>
-    <span>
-                                &nbsp;: int    </span>
-</dt>
-<dd>Get the current list index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_next">next()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Move the cursor to the next list index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetExists">offsetExists()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if the specified index exists and is not empty.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet">offsetGet()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Get the item from the specified index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet">offsetSet()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet">offsetSet()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Set the item at the specified offset.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset">offsetUnset()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Unset the item at the specified index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_pop">pop()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Pops an item from the end of the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prepend">prepend()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend">prepend()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Prepend items at the start of the list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prev">prev()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Move the cursor to the previous list index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_push">push()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push">push()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Push an item at the end of the list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_remove">remove()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove">remove()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Remove an item from the list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_rewind">rewind()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Rewind the iterator&#039;s cursor.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_set">set()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set">set()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Set an item at the specified index.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setIteratorMode">setIteratorMode()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray">toArray()</a>
     <span>
-                                &nbsp;: int    </span>
-</dt>
-<dd>Set the mode of iteration.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_shift">shift()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Shift an item from the beginning of the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toArray">toArray()</a>
-    <span>
-                                &nbsp;: array&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;    </span>
+                                &nbsp;: array&lt;int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;    </span>
 </dt>
 <dd>Return array representation of list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_top">top()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection">toStrictCollection()</a>
     <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Peek at the item at the end of the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toStrictCollection">toStrictCollection()</a>
-    <span>
-                                &nbsp;: <a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;    </span>
+                                &nbsp;: <a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;    </span>
 </dt>
 <dd>Turn list into a type-sensitive collection.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_unshift">unshift()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift">unshift()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Prepend the list with an item.</dd>
 
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_valid">valid()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if current cursor position is valid.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -protected">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes">setAllowedTypes()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Set allowed data types of list items.</dd>
-
     </dl>
 
 
@@ -531,49 +372,6 @@ constructor with an array of atomic types or fully qualified class names.</p>
         
 
         
-    <section class="phpdocumentor-properties">
-        <h3 class="phpdocumentor-elements__header" id="properties">
-            Properties
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#properties" class="headerlink"><i class="fas fa-link"></i></a>
-
-        </h3>
-                    <article
-        class="
-            phpdocumentor-element
-            -property
-            -public
-                                                -read-only        "
->
-    <h4 class="phpdocumentor-element__name" id="property_allowedTypes">
-        $allowedTypes
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#property_allowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
-
-        <span class="phpdocumentor-element__modifiers">
-                        <small class="phpdocumentor-element__modifier">read-only</small>        </span>
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">0</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.0" class="phpdocumentor-element-found-in__source" data-line="0" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-    
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-        <span class="phpdocumentor-signature__type">array&lt;string|int, string&gt;</span>
-    <span class="phpdocumentor-signature__name">$allowedTypes</span>
-    </code>
-
-        <section class="phpdocumentor-description"><p>The allowed data types for values.</p>
-</section>
-
-    
-    
-
-</article>
-            </section>
 
             <section class="phpdocumentor-methods">
         <h3 class="phpdocumentor-elements__header" id="methods">
@@ -589,15 +387,15 @@ constructor with an array of atomic types or fully qualified class names.</p>
 >
     <h4 class="phpdocumentor-element__name" id="method___construct">
         __construct()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method___construct" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">726</span>
+    <span class="phpdocumentor-element-found-in__line">366</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.726" class="phpdocumentor-element-found-in__source" data-line="726" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.366" class="phpdocumentor-element-found-in__source" data-line="366" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Create a type-sensitive, traversable list of items.</p>
@@ -642,7 +440,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method___construct#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -659,129 +457,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method___get">
-        __get()
-        <a href="classes/OCC-Basics-Traits-Getter.html#method___get" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/Getter.php"><a href="files/src-traits-getter.html"><abbr title="src/Traits/Getter.php">Getter.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">60</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.60" class="phpdocumentor-element-found-in__source" data-line="60" data-modal="source-view" data-src="files/src/Traits/Getter.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Read data from an inaccessible property.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">__get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">string&nbsp;</span><span class="phpdocumentor-signature__argument__name">$property</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">mixed</span></code>
-
-    <div class="phpdocumentor-label-line">
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$property</span>
-                : <span class="phpdocumentor-signature__argument__return-type">string</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The class property to get</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-Traits-Getter.html#method___get#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the property or getter method do not exist</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">mixed</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The class property's current value</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method___isset">
-        __isset()
-        <a href="classes/OCC-Basics-Traits-Getter.html#method___isset" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/Getter.php"><a href="files/src-traits-getter.html"><abbr title="src/Traits/Getter.php">Getter.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">83</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.83" class="phpdocumentor-element-found-in__source" data-line="83" data-modal="source-view" data-src="files/src/Traits/Getter.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if an inaccessible property is set and not empty.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">__isset</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">string&nbsp;</span><span class="phpdocumentor-signature__argument__name">$property</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$property</span>
-                : <span class="phpdocumentor-signature__argument__return-type">string</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The class property to check</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the class property is set and not empty</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -791,22 +466,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_add">
         add()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_add" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">112</span>
+    <span class="phpdocumentor-element-found-in__line">69</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.112" class="phpdocumentor-element-found-in__source" data-line="112" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.69" class="phpdocumentor-element-found-in__source" data-line="69" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Add/insert a new item at the specified offset.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">add</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">add</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -826,7 +501,7 @@ Possible values are:</p>
             </dd>
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The new item for the offset</p>
@@ -838,7 +513,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_add#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -846,7 +521,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -874,22 +549,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_append">
         append()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_append" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">128</span>
+    <span class="phpdocumentor-element-found-in__line">85</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.128" class="phpdocumentor-element-found-in__source" data-line="128" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.85" class="phpdocumentor-element-found-in__source" data-line="85" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Append items at the end of the list.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">append</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">append</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -900,7 +575,7 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$values</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>One or more items to append</p>
@@ -912,7 +587,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_append#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -920,7 +595,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if any <code class="prettyprint">$values</code> is not of allowed type</p>
 </section>
@@ -929,66 +604,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_bottom">
-        bottom()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_bottom" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">156</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.156" class="phpdocumentor-element-found-in__source" data-line="156" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Peek at the item at the beginning of the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">bottom</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_bottom#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The first item of the list</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -998,15 +613,15 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_clear">
         clear()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_clear" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">168</span>
+    <span class="phpdocumentor-element-found-in__line">111</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.168" class="phpdocumentor-element-found-in__source" data-line="168" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.111" class="phpdocumentor-element-found-in__source" data-line="111" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Clear the list of any items.</p>
@@ -1024,92 +639,6 @@ Possible values are:</p>
     
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_count">
-        count()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_count" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">183</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.183" class="phpdocumentor-element-found-in__source" data-line="183" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the number of items on the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">count</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">int</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">int</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The number of items on the list</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_current">
-        current()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_current" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">195</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.195" class="phpdocumentor-element-found-in__source" data-line="195" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the current list item.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">current</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The current item</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1119,22 +648,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_get">
         get()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_get" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">211</span>
+    <span class="phpdocumentor-element-found-in__line">130</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.211" class="phpdocumentor-element-found-in__source" data-line="211" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.130" class="phpdocumentor-element-found-in__source" data-line="130" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Get the item at the specified index.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
+                    <span class="phpdocumentor-signature__name">get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -1157,7 +686,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_get#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -1175,197 +704,13 @@ Possible values are:</p>
 
             <section>
         <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                     &mdash;
                 <section class="phpdocumentor-description"><p>The item</p>
 </section>
 
             </section>
 
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_getAllowedTypes">
-        getAllowedTypes()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getAllowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">223</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.223" class="phpdocumentor-element-found-in__source" data-line="223" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get allowed data types for list items.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">getAllowedTypes</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">array&lt;string|int, string&gt;</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">array&lt;string|int, string&gt;</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The list of allowed data types</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_getIteratorMode">
-        getIteratorMode()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getIteratorMode" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">235</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.235" class="phpdocumentor-element-found-in__source" data-line="235" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the mode of iteration.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">getIteratorMode</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">int</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">int</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The set of flags and modes of iteration</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_isAllowedType">
-        isAllowedType()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isAllowedType" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">249</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.249" class="phpdocumentor-element-found-in__source" data-line="249" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if the item&#039;s data type is allowed on the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">isAllowedType</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The item to check</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the item's data type is allowed</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_isEmpty">
-        isEmpty()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isEmpty" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">275</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.275" class="phpdocumentor-element-found-in__source" data-line="275" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if list is empty.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">isEmpty</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the list contains no items</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1375,15 +720,15 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_isList">
         isList()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isList" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">287</span>
+    <span class="phpdocumentor-element-found-in__line">142</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.287" class="phpdocumentor-element-found-in__source" data-line="287" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.142" class="phpdocumentor-element-found-in__source" data-line="142" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Check if this can be considered a list.</p>
@@ -1409,211 +754,6 @@ Possible values are:</p>
 
             </section>
 
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_key">
-        key()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_key" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">299</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.299" class="phpdocumentor-element-found-in__source" data-line="299" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the current list index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">key</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">int</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">int</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The current list index</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_next">
-        next()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_next" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">311</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.311" class="phpdocumentor-element-found-in__source" data-line="311" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Move the cursor to the next list index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">next</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-    
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_offsetExists">
-        offsetExists()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetExists" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">325</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.325" class="phpdocumentor-element-found-in__source" data-line="325" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if the specified index exists and is not empty.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">offsetExists</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$offset</span>
-                : <span class="phpdocumentor-signature__argument__return-type">int</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The index to check</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the index exists and is not empty</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_offsetGet">
-        offsetGet()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">341</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.341" class="phpdocumentor-element-found-in__source" data-line="341" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the item from the specified index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">offsetGet</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$offset</span>
-                : <span class="phpdocumentor-signature__argument__return-type">int</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The item's index</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The item</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1623,22 +763,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_offsetSet">
         offsetSet()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">359</span>
+    <span class="phpdocumentor-element-found-in__line">160</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.359" class="phpdocumentor-element-found-in__source" data-line="359" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.160" class="phpdocumentor-element-found-in__source" data-line="160" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Set the item at the specified offset.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">offsetSet</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int|null&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">offsetSet</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int|null&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -1658,7 +798,7 @@ Possible values are:</p>
             </dd>
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The new item for the offset</p>
@@ -1670,7 +810,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -1678,7 +818,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -1697,130 +837,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_offsetUnset">
-        offsetUnset()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">384</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.384" class="phpdocumentor-element-found-in__source" data-line="384" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Unset the item at the specified index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">offsetUnset</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$offset</span>
-                : <span class="phpdocumentor-signature__argument__return-type">int</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The item's index</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-    
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_pop">
-        pop()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_pop" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">398</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.398" class="phpdocumentor-element-found-in__source" data-line="398" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Pops an item from the end of the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">pop</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_pop#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The item from the end of the list</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1830,22 +846,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_prepend">
         prepend()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prepend" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">414</span>
+    <span class="phpdocumentor-element-found-in__line">185</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.414" class="phpdocumentor-element-found-in__source" data-line="414" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.185" class="phpdocumentor-element-found-in__source" data-line="185" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Prepend items at the start of the list.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">prepend</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">prepend</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -1856,7 +872,7 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$values</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>One or more items to prepend</p>
@@ -1868,7 +884,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prepend#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -1876,7 +892,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -1885,41 +901,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_prev">
-        prev()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prev" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">440</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.440" class="phpdocumentor-element-found-in__source" data-line="440" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Move the cursor to the previous list index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">prev</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-    
 </article>
                     <article
         class="phpdocumentor-element
@@ -1929,22 +910,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_push">
         push()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_push" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">456</span>
+    <span class="phpdocumentor-element-found-in__line">215</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.456" class="phpdocumentor-element-found-in__source" data-line="456" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.215" class="phpdocumentor-element-found-in__source" data-line="215" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Push an item at the end of the list.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">push</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">push</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -1955,7 +936,7 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The item to push</p>
@@ -1967,7 +948,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_push#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -1975,7 +956,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -1993,15 +974,15 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_remove">
         remove()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_remove" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">480</span>
+    <span class="phpdocumentor-element-found-in__line">239</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.480" class="phpdocumentor-element-found-in__source" data-line="480" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.239" class="phpdocumentor-element-found-in__source" data-line="239" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Remove an item from the list.</p>
@@ -2031,7 +1012,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_remove#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -2048,41 +1029,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_rewind">
-        rewind()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_rewind" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">492</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.492" class="phpdocumentor-element-found-in__source" data-line="492" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Rewind the iterator&#039;s cursor.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">rewind</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-    
 </article>
                     <article
         class="phpdocumentor-element
@@ -2092,22 +1038,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_set">
         set()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_set" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">521</span>
+    <span class="phpdocumentor-element-found-in__line">268</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.521" class="phpdocumentor-element-found-in__source" data-line="521" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.268" class="phpdocumentor-element-found-in__source" data-line="268" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Set an item at the specified index.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">set</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">set</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2127,7 +1073,7 @@ Possible values are:</p>
             </dd>
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The item</p>
@@ -2139,7 +1085,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_set#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -2147,7 +1093,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -2156,150 +1102,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_setIteratorMode">
-        setIteratorMode()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setIteratorMode" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">568</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.568" class="phpdocumentor-element-found-in__source" data-line="568" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Set the mode of iteration.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">setIteratorMode</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$mode</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">int</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$mode</span>
-                : <span class="phpdocumentor-signature__argument__return-type">int</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The new iterator mode (0, 1, 2 or 3)</p>
-<p>There are two orthogonal sets of modes that can be set.</p>
-<p>The direction of iteration (either one or the other):</p>
-<ul>
-<li>StrictList::IT_MODE_FIFO (queue style)</li>
-<li>StrictList::IT_MODE_LIFO (stack style)</li>
-</ul>
-<p>The behavior of the iterator (either one or the other):</p>
-<ul>
-<li>StrictList::IT_MODE_DELETE (delete items)</li>
-<li>StrictList::IT_MODE_KEEP (keep items)</li>
-</ul>
-<p>The default mode is: IT_MODE_FIFO | IT_MODE_KEEP</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setIteratorMode#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RangeException">RangeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if an invalid <code class="prettyprint">$mode</code> is given</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">int</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The set of flags and modes of iteration</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_shift">
-        shift()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_shift" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">590</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.590" class="phpdocumentor-element-found-in__source" data-line="590" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Shift an item from the beginning of the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">shift</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_shift#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The first item of the list</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -2309,22 +1111,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_toArray">
         toArray()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toArray" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">602</span>
+    <span class="phpdocumentor-element-found-in__line">280</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.602" class="phpdocumentor-element-found-in__source" data-line="602" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.280" class="phpdocumentor-element-found-in__source" data-line="280" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Return array representation of list.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">toArray</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">array&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span></code>
+                    <span class="phpdocumentor-signature__name">toArray</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">array&lt;int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2336,73 +1138,13 @@ Possible values are:</p>
 
             <section>
         <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">array&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span>
+        <span class="phpdocumentor-signature__response_type">array&lt;int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span>
                     &mdash;
                 <section class="phpdocumentor-description"><p>Array of list items</p>
 </section>
 
             </section>
 
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_top">
-        top()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_top" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">632</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.632" class="phpdocumentor-element-found-in__source" data-line="632" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Peek at the item at the end of the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">top</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_top#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The last item of the list</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -2412,22 +1154,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_toStrictCollection">
         toStrictCollection()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toStrictCollection" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">614</span>
+    <span class="phpdocumentor-element-found-in__line">292</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.614" class="phpdocumentor-element-found-in__source" data-line="614" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.292" class="phpdocumentor-element-found-in__source" data-line="292" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Turn list into a type-sensitive collection.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">toStrictCollection</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span></code>
+                    <span class="phpdocumentor-signature__name">toStrictCollection</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2439,7 +1181,7 @@ Possible values are:</p>
 
             <section>
         <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span>
+        <span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span>
                     &mdash;
                 <section class="phpdocumentor-description"><p>A type-sensitive collection of the list's items</p>
 </section>
@@ -2455,22 +1197,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_unshift">
         unshift()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_unshift" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">664</span>
+    <span class="phpdocumentor-element-found-in__line">328</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.664" class="phpdocumentor-element-found-in__source" data-line="664" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.328" class="phpdocumentor-element-found-in__source" data-line="328" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Prepend the list with an item.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">unshift</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">unshift</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2481,7 +1223,7 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The item to unshift</p>
@@ -2493,7 +1235,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_unshift#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -2501,7 +1243,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -2510,111 +1252,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_valid">
-        valid()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_valid" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">684</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.684" class="phpdocumentor-element-found-in__source" data-line="684" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if current cursor position is valid.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">valid</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the current cursor position is valid</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -protected
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_setAllowedTypes">
-        setAllowedTypes()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">535</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictList.html#source-view.535" class="phpdocumentor-element-found-in__source" data-line="535" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Set allowed data types of list items.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">protected</span>
-                    <span class="phpdocumentor-signature__name">setAllowedTypes</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;&nbsp;</span><span class="phpdocumentor-signature__argument__name">$allowedTypes</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">[]</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$allowedTypes</span>
-                : <span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;</span>
-                 = <span class="phpdocumentor-signature__argument__default-value">[]</span>            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>Allowed data types of items</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if any value of <code class="prettyprint">$allowedTypes</code> is not a string</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-    
 </article>
             </section>
 
@@ -2721,57 +1358,28 @@ Possible values are:</p>
             <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
             <li>
                 <ul class="phpdocumentor-list -clean">
-                                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#toc-properties">Properties</a></li>
-                                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#toc-methods">Methods</a></li>
+                                                                                <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#toc-methods">Methods</a></li>
                                     </ul>
             </li>
             
-                            <li class="phpdocumentor-on-this-page-section__title">Properties</li>
-                <li>
-                    <ul class="phpdocumentor-list -clean">
-                                                    <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#property_allowedTypes">$allowedTypes<a href="classes/OCC-Basics-DataStructures-StrictList.html"></li>
-                                            </ul>
-                </li>
             
                         <li class="phpdocumentor-on-this-page-section__title">Methods</li>
             <li>
                 <ul class="phpdocumentor-list -clean">
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method___construct">__construct()</a></li>
-                                            <li><a href="classes/OCC-Basics-Traits-Getter.html#method___get">__get()</a></li>
-                                            <li><a href="classes/OCC-Basics-Traits-Getter.html#method___isset">__isset()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_add">add()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_append">append()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_bottom">bottom()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_clear">clear()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_count">count()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_current">current()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_get">get()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getAllowedTypes">getAllowedTypes()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getIteratorMode">getIteratorMode()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isAllowedType">isAllowedType()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isEmpty">isEmpty()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isList">isList()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_key">key()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_next">next()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetExists">offsetExists()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet">offsetGet()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet">offsetSet()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset">offsetUnset()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_pop">pop()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prepend">prepend()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prev">prev()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_push">push()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_remove">remove()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_rewind">rewind()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_set">set()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setIteratorMode">setIteratorMode()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_shift">shift()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toArray">toArray()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_top">top()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toStrictCollection">toStrictCollection()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_unshift">unshift()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_valid">valid()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes">setAllowedTypes()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct">__construct()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add">add()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append">append()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear">clear()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get">get()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList">isList()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet">offsetSet()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend">prepend()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push">push()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove">remove()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set">set()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray">toArray()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection">toStrictCollection()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift">unshift()</a></li>
                                     </ul>
             </li>
                     </ul>
diff --git a/doc/classes/OCC-Basics-DataStructures-StrictQueue.html b/doc/classes/OCC-Basics-DataStructures-StrictQueue.html
index 414e310..96e4fab 100644
--- a/doc/classes/OCC-Basics-DataStructures-StrictQueue.html
+++ b/doc/classes/OCC-Basics-DataStructures-StrictQueue.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -161,7 +179,7 @@
     StrictQueue
 
         <span class="phpdocumentor-element__extends">
-        extends <a href="classes/OCC-Basics-DataStructures-StrictList.html"><abbr title="\OCC\Basics\DataStructures\StrictList">StrictList</abbr></a>
+        extends <abbr title="\SplQueue">SplQueue</abbr>
     </span>
     
             <div class="phpdocumentor-element__package">
@@ -172,10 +190,10 @@
                             </ul>
         </div>
     
-            <span class="phpdocumentor-element__implements">
-            implements
-                            <abbr title="\ArrayAccess">ArrayAccess</abbr>,                             <abbr title="\Countable">Countable</abbr>,                             <abbr title="\Iterator">Iterator</abbr>,                             <abbr title="\Serializable">Serializable</abbr>                    </span>
     
+            <span class="phpdocumentor-element__extends">
+            Uses
+                            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html"><abbr title="\OCC\Basics\DataStructures\Traits\StrictSplDatastructureTrait">StrictSplDatastructureTrait</abbr></a>                    </span>
     </h2>
 
 <div class="phpdocumentor-label-line">
@@ -186,18 +204,16 @@
         <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictQueue.php"><a href="files/src-datastructures-strictqueue.html"><abbr title="src/DataStructures/StrictQueue.php">StrictQueue.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">55</span>
+    <span class="phpdocumentor-element-found-in__line">45</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.55" class="phpdocumentor-element-found-in__source" data-line="55" data-modal="source-view" data-src="files/src/DataStructures/StrictQueue.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.45" class="phpdocumentor-element-found-in__source" data-line="45" data-modal="source-view" data-src="files/src/DataStructures/StrictQueue.php.txt"></a>
     </aside>
 
             <p class="phpdocumentor-summary">A type-sensitive, taversable queue (FIFO).</p>
 
-    <section class="phpdocumentor-description"><p>Extends <a href="https://www.php.net/spldoublylinkedlist">\SplDoublyLinkedList</a> with
-an option to restrict the allowed data types for list items by providing the
-constructor with an array of atomic types or fully qualified class names. It
-also restricts the iterator direction to first-in, first-out (FIFO) exactly
-like <a href="https://www.php.net/splqueue">\SplQueue</a>.</p>
+    <section class="phpdocumentor-description"><p>Extends <a href="https://www.php.net/splqueue">\SplQueue</a> with an option to restrict
+the allowed data types for list items by providing the constructor with an
+array of atomic types or fully qualified class names.</p>
 </section>
 
 
@@ -237,32 +253,12 @@ like <a href="https://www.php.net/splqueue">\SplQueue</a>.</p>
 
 
 
-    <h4 id="toc-interfaces">
-        Interfaces
-        <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#toc-interfaces" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <dl class="phpdocumentor-table-of-contents">
-                    <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\ArrayAccess">ArrayAccess</abbr></dt>            <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\Countable">Countable</abbr></dt>            <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\Iterator">Iterator</abbr></dt>            <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\Serializable">Serializable</abbr></dt>    </dl>
 
 
 
 
 
 
-<h4 id="toc-properties">
-    Properties
-    <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#toc-properties" class="headerlink"><i class="fas fa-link"></i></a>
-
-</h4>
-<dl class="phpdocumentor-table-of-contents">
-            <dt class="phpdocumentor-table-of-contents__entry -property -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#property_allowedTypes">$allowedTypes</a>
-    <span>
-                        &nbsp;: array&lt;string|int, string&gt;            </span>
-</dt>
-
-    </dl>
 
 <h4 id="toc-methods">
     Methods
@@ -271,75 +267,33 @@ like <a href="https://www.php.net/splqueue">\SplQueue</a>.</p>
 </h4>
 <dl class="phpdocumentor-table-of-contents">
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method___construct">__construct()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct">__construct()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
-<dd>Create a type-sensitive, traversable queue of items.</dd>
+<dd>Create a type-sensitive, traversable list of items.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-Traits-Getter.html#method___get">__get()</a>
-    <span>
-                                &nbsp;: mixed    </span>
-</dt>
-<dd>Read data from an inaccessible property.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-Traits-Getter.html#method___isset">__isset()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if an inaccessible property is set and not empty.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_add">add()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add">add()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Add/insert a new item at the specified offset.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_append">append()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append">append()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Append items at the end of the list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_bottom">bottom()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Peek at the item at the beginning of the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_clear">clear()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear">clear()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Clear the list of any items.</dd>
 
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_count">count()</a>
-    <span>
-                                &nbsp;: int    </span>
-</dt>
-<dd>Get the number of items on the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_current">current()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Get the current list item.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method_dequeue">dequeue()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Dequeue an item from the queue.</dd>
-
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
     <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method_enqueue">enqueue()</a>
     <span>
@@ -348,194 +302,75 @@ like <a href="https://www.php.net/splqueue">\SplQueue</a>.</p>
 <dd>Add an item to the queue.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_get">get()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get">get()</a>
     <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
+                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>    </span>
 </dt>
 <dd>Get the item at the specified index.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getAllowedTypes">getAllowedTypes()</a>
-    <span>
-                                &nbsp;: array&lt;string|int, string&gt;    </span>
-</dt>
-<dd>Get allowed data types for list items.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getIteratorMode">getIteratorMode()</a>
-    <span>
-                                &nbsp;: int    </span>
-</dt>
-<dd>Get the mode of iteration.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isAllowedType">isAllowedType()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if the item&#039;s data type is allowed on the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isEmpty">isEmpty()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if list is empty.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isList">isList()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList">isList()</a>
     <span>
                                 &nbsp;: true    </span>
 </dt>
 <dd>Check if this can be considered a list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_key">key()</a>
-    <span>
-                                &nbsp;: int    </span>
-</dt>
-<dd>Get the current list index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_next">next()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Move the cursor to the next list index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetExists">offsetExists()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if the specified index exists and is not empty.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet">offsetGet()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Get the item from the specified index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet">offsetSet()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet">offsetSet()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Set the item at the specified offset.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset">offsetUnset()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Unset the item at the specified index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_pop">pop()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Pops an item from the end of the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prepend">prepend()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend">prepend()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Prepend items at the start of the list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prev">prev()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Move the cursor to the previous list index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_push">push()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push">push()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Push an item at the end of the list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_remove">remove()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove">remove()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Remove an item from the list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_rewind">rewind()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Rewind the iterator&#039;s cursor.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_set">set()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set">set()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Set an item at the specified index.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method_setIteratorMode">setIteratorMode()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray">toArray()</a>
     <span>
-                                &nbsp;: int    </span>
-</dt>
-<dd>Set the mode of iteration.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_shift">shift()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Shift an item from the beginning of the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toArray">toArray()</a>
-    <span>
-                                &nbsp;: array&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;    </span>
+                                &nbsp;: array&lt;int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;    </span>
 </dt>
 <dd>Return array representation of list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_top">top()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection">toStrictCollection()</a>
     <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Peek at the item at the end of the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toStrictCollection">toStrictCollection()</a>
-    <span>
-                                &nbsp;: <a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;    </span>
+                                &nbsp;: <a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;    </span>
 </dt>
 <dd>Turn list into a type-sensitive collection.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_unshift">unshift()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift">unshift()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Prepend the list with an item.</dd>
 
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_valid">valid()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if current cursor position is valid.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -protected">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes">setAllowedTypes()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Set allowed data types of list items.</dd>
-
     </dl>
 
 
@@ -544,49 +379,6 @@ like <a href="https://www.php.net/splqueue">\SplQueue</a>.</p>
         
 
         
-    <section class="phpdocumentor-properties">
-        <h3 class="phpdocumentor-elements__header" id="properties">
-            Properties
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#properties" class="headerlink"><i class="fas fa-link"></i></a>
-
-        </h3>
-                    <article
-        class="
-            phpdocumentor-element
-            -property
-            -public
-                                                -read-only        "
->
-    <h4 class="phpdocumentor-element__name" id="property_allowedTypes">
-        $allowedTypes
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#property_allowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
-
-        <span class="phpdocumentor-element__modifiers">
-                        <small class="phpdocumentor-element__modifier">read-only</small>        </span>
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">0</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.0" class="phpdocumentor-element-found-in__source" data-line="0" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-    
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-        <span class="phpdocumentor-signature__type">array&lt;string|int, string&gt;</span>
-    <span class="phpdocumentor-signature__name">$allowedTypes</span>
-    </code>
-
-        <section class="phpdocumentor-description"><p>The allowed data types for values.</p>
-</section>
-
-    
-    
-
-</article>
-            </section>
 
             <section class="phpdocumentor-methods">
         <h3 class="phpdocumentor-elements__header" id="methods">
@@ -602,18 +394,18 @@ like <a href="https://www.php.net/splqueue">\SplQueue</a>.</p>
 >
     <h4 class="phpdocumentor-element__name" id="method___construct">
         __construct()
-        <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method___construct" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictQueue.php"><a href="files/src-datastructures-strictqueue.html"><abbr title="src/DataStructures/StrictQueue.php">StrictQueue.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">146</span>
+    <span class="phpdocumentor-element-found-in__line">366</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.146" class="phpdocumentor-element-found-in__source" data-line="146" data-modal="source-view" data-src="files/src/DataStructures/StrictQueue.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.366" class="phpdocumentor-element-found-in__source" data-line="366" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
-        <p class="phpdocumentor-summary">Create a type-sensitive, traversable queue of items.</p>
+        <p class="phpdocumentor-summary">Create a type-sensitive, traversable list of items.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
@@ -655,7 +447,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method___construct#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -672,129 +464,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method___get">
-        __get()
-        <a href="classes/OCC-Basics-Traits-Getter.html#method___get" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/Getter.php"><a href="files/src-traits-getter.html"><abbr title="src/Traits/Getter.php">Getter.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">60</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.60" class="phpdocumentor-element-found-in__source" data-line="60" data-modal="source-view" data-src="files/src/Traits/Getter.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Read data from an inaccessible property.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">__get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">string&nbsp;</span><span class="phpdocumentor-signature__argument__name">$property</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">mixed</span></code>
-
-    <div class="phpdocumentor-label-line">
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$property</span>
-                : <span class="phpdocumentor-signature__argument__return-type">string</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The class property to get</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-Traits-Getter.html#method___get#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the property or getter method do not exist</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">mixed</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The class property's current value</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method___isset">
-        __isset()
-        <a href="classes/OCC-Basics-Traits-Getter.html#method___isset" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/Getter.php"><a href="files/src-traits-getter.html"><abbr title="src/Traits/Getter.php">Getter.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">83</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.83" class="phpdocumentor-element-found-in__source" data-line="83" data-modal="source-view" data-src="files/src/Traits/Getter.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if an inaccessible property is set and not empty.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">__isset</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">string&nbsp;</span><span class="phpdocumentor-signature__argument__name">$property</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$property</span>
-                : <span class="phpdocumentor-signature__argument__return-type">string</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The class property to check</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the class property is set and not empty</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -804,22 +473,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_add">
         add()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_add" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">112</span>
+    <span class="phpdocumentor-element-found-in__line">69</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.112" class="phpdocumentor-element-found-in__source" data-line="112" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.69" class="phpdocumentor-element-found-in__source" data-line="69" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Add/insert a new item at the specified offset.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">add</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">add</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -839,7 +508,7 @@ Possible values are:</p>
             </dd>
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The new item for the offset</p>
@@ -851,7 +520,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_add#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -859,7 +528,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -887,22 +556,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_append">
         append()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_append" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">128</span>
+    <span class="phpdocumentor-element-found-in__line">85</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.128" class="phpdocumentor-element-found-in__source" data-line="128" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.85" class="phpdocumentor-element-found-in__source" data-line="85" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Append items at the end of the list.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">append</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">append</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -913,7 +582,7 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$values</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>One or more items to append</p>
@@ -925,7 +594,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_append#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -933,7 +602,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if any <code class="prettyprint">$values</code> is not of allowed type</p>
 </section>
@@ -942,66 +611,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_bottom">
-        bottom()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_bottom" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">156</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.156" class="phpdocumentor-element-found-in__source" data-line="156" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Peek at the item at the beginning of the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">bottom</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_bottom#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The first item of the list</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1011,15 +620,15 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_clear">
         clear()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_clear" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">168</span>
+    <span class="phpdocumentor-element-found-in__line">111</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.168" class="phpdocumentor-element-found-in__source" data-line="168" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.111" class="phpdocumentor-element-found-in__source" data-line="111" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Clear the list of any items.</p>
@@ -1037,135 +646,6 @@ Possible values are:</p>
     
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_count">
-        count()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_count" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">183</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.183" class="phpdocumentor-element-found-in__source" data-line="183" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the number of items on the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">count</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">int</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">int</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The number of items on the list</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_current">
-        current()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_current" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">195</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.195" class="phpdocumentor-element-found-in__source" data-line="195" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the current list item.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">current</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The current item</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_dequeue">
-        dequeue()
-        <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method_dequeue" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictQueue.php"><a href="files/src-datastructures-strictqueue.html"><abbr title="src/DataStructures/StrictQueue.php">StrictQueue.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">64</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.64" class="phpdocumentor-element-found-in__source" data-line="64" data-modal="source-view" data-src="files/src/DataStructures/StrictQueue.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Dequeue an item from the queue.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">dequeue</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The dequeued item</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1181,9 +661,9 @@ Possible values are:</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictQueue.php"><a href="files/src-datastructures-strictqueue.html"><abbr title="src/DataStructures/StrictQueue.php">StrictQueue.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">80</span>
+    <span class="phpdocumentor-element-found-in__line">61</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.80" class="phpdocumentor-element-found-in__source" data-line="80" data-modal="source-view" data-src="files/src/DataStructures/StrictQueue.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.61" class="phpdocumentor-element-found-in__source" data-line="61" data-modal="source-view" data-src="files/src/DataStructures/StrictQueue.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Add an item to the queue.</p>
@@ -1221,7 +701,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -1239,22 +719,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_get">
         get()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_get" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">211</span>
+    <span class="phpdocumentor-element-found-in__line">130</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.211" class="phpdocumentor-element-found-in__source" data-line="211" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.130" class="phpdocumentor-element-found-in__source" data-line="130" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Get the item at the specified index.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
+                    <span class="phpdocumentor-signature__name">get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -1277,7 +757,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_get#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -1295,197 +775,13 @@ Possible values are:</p>
 
             <section>
         <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                     &mdash;
                 <section class="phpdocumentor-description"><p>The item</p>
 </section>
 
             </section>
 
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_getAllowedTypes">
-        getAllowedTypes()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getAllowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">223</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.223" class="phpdocumentor-element-found-in__source" data-line="223" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get allowed data types for list items.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">getAllowedTypes</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">array&lt;string|int, string&gt;</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">array&lt;string|int, string&gt;</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The list of allowed data types</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_getIteratorMode">
-        getIteratorMode()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getIteratorMode" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">235</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.235" class="phpdocumentor-element-found-in__source" data-line="235" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the mode of iteration.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">getIteratorMode</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">int</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">int</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The set of flags and modes of iteration</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_isAllowedType">
-        isAllowedType()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isAllowedType" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">249</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.249" class="phpdocumentor-element-found-in__source" data-line="249" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if the item&#039;s data type is allowed on the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">isAllowedType</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The item to check</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the item's data type is allowed</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_isEmpty">
-        isEmpty()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isEmpty" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">275</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.275" class="phpdocumentor-element-found-in__source" data-line="275" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if list is empty.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">isEmpty</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the list contains no items</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1495,15 +791,15 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_isList">
         isList()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isList" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">287</span>
+    <span class="phpdocumentor-element-found-in__line">142</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.287" class="phpdocumentor-element-found-in__source" data-line="287" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.142" class="phpdocumentor-element-found-in__source" data-line="142" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Check if this can be considered a list.</p>
@@ -1529,211 +825,6 @@ Possible values are:</p>
 
             </section>
 
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_key">
-        key()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_key" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">299</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.299" class="phpdocumentor-element-found-in__source" data-line="299" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the current list index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">key</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">int</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">int</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The current list index</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_next">
-        next()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_next" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">311</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.311" class="phpdocumentor-element-found-in__source" data-line="311" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Move the cursor to the next list index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">next</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-    
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_offsetExists">
-        offsetExists()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetExists" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">325</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.325" class="phpdocumentor-element-found-in__source" data-line="325" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if the specified index exists and is not empty.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">offsetExists</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$offset</span>
-                : <span class="phpdocumentor-signature__argument__return-type">int</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The index to check</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the index exists and is not empty</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_offsetGet">
-        offsetGet()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">341</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.341" class="phpdocumentor-element-found-in__source" data-line="341" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the item from the specified index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">offsetGet</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$offset</span>
-                : <span class="phpdocumentor-signature__argument__return-type">int</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The item's index</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The item</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1743,22 +834,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_offsetSet">
         offsetSet()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">359</span>
+    <span class="phpdocumentor-element-found-in__line">160</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.359" class="phpdocumentor-element-found-in__source" data-line="359" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.160" class="phpdocumentor-element-found-in__source" data-line="160" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Set the item at the specified offset.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">offsetSet</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int|null&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">offsetSet</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int|null&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -1778,7 +869,7 @@ Possible values are:</p>
             </dd>
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The new item for the offset</p>
@@ -1790,7 +881,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -1798,7 +889,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -1817,130 +908,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_offsetUnset">
-        offsetUnset()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">384</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.384" class="phpdocumentor-element-found-in__source" data-line="384" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Unset the item at the specified index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">offsetUnset</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$offset</span>
-                : <span class="phpdocumentor-signature__argument__return-type">int</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The item's index</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-    
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_pop">
-        pop()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_pop" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">398</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.398" class="phpdocumentor-element-found-in__source" data-line="398" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Pops an item from the end of the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">pop</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_pop#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The item from the end of the list</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1950,22 +917,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_prepend">
         prepend()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prepend" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">414</span>
+    <span class="phpdocumentor-element-found-in__line">185</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.414" class="phpdocumentor-element-found-in__source" data-line="414" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.185" class="phpdocumentor-element-found-in__source" data-line="185" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Prepend items at the start of the list.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">prepend</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">prepend</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -1976,7 +943,7 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$values</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>One or more items to prepend</p>
@@ -1988,7 +955,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prepend#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -1996,7 +963,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -2005,41 +972,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_prev">
-        prev()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prev" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">440</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.440" class="phpdocumentor-element-found-in__source" data-line="440" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Move the cursor to the previous list index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">prev</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-    
 </article>
                     <article
         class="phpdocumentor-element
@@ -2049,22 +981,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_push">
         push()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_push" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">456</span>
+    <span class="phpdocumentor-element-found-in__line">215</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.456" class="phpdocumentor-element-found-in__source" data-line="456" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.215" class="phpdocumentor-element-found-in__source" data-line="215" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Push an item at the end of the list.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">push</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">push</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2075,7 +1007,7 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The item to push</p>
@@ -2087,7 +1019,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_push#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -2095,7 +1027,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -2113,15 +1045,15 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_remove">
         remove()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_remove" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">480</span>
+    <span class="phpdocumentor-element-found-in__line">239</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.480" class="phpdocumentor-element-found-in__source" data-line="480" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.239" class="phpdocumentor-element-found-in__source" data-line="239" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Remove an item from the list.</p>
@@ -2151,7 +1083,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_remove#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -2168,41 +1100,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_rewind">
-        rewind()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_rewind" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">492</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.492" class="phpdocumentor-element-found-in__source" data-line="492" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Rewind the iterator&#039;s cursor.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">rewind</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-    
 </article>
                     <article
         class="phpdocumentor-element
@@ -2212,22 +1109,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_set">
         set()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_set" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">521</span>
+    <span class="phpdocumentor-element-found-in__line">268</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.521" class="phpdocumentor-element-found-in__source" data-line="521" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.268" class="phpdocumentor-element-found-in__source" data-line="268" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Set an item at the specified index.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">set</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">set</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2247,7 +1144,7 @@ Possible values are:</p>
             </dd>
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The item</p>
@@ -2259,7 +1156,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_set#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -2267,7 +1164,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -2276,159 +1173,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                -final        "
->
-    <h4 class="phpdocumentor-element__name" id="method_setIteratorMode">
-        setIteratorMode()
-        <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method_setIteratorMode" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictQueue.php"><a href="files/src-datastructures-strictqueue.html"><abbr title="src/DataStructures/StrictQueue.php">StrictQueue.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">108</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.108" class="phpdocumentor-element-found-in__source" data-line="108" data-modal="source-view" data-src="files/src/DataStructures/StrictQueue.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Set the mode of iteration.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-        <span class="phpdocumentor-signature__final">final</span>            <span class="phpdocumentor-signature__name">setIteratorMode</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$mode</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">int</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$mode</span>
-                : <span class="phpdocumentor-signature__argument__return-type">int</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The new iterator mode (0 or 1)</p>
-<p>There are two orthogonal sets of modes that can be set.</p>
-<p>The direction of iteration (fixed for StrictQueue):</p>
-<ul>
-<li>StrictQueue::IT_MODE_FIFO (queue style)</li>
-</ul>
-<p>The behavior of the iterator (either one or the other):</p>
-<ul>
-<li>StrictQueue::IT_MODE_DELETE (delete items)</li>
-<li>StrictQueue::IT_MODE_KEEP (keep items)</li>
-</ul>
-<p>The default mode is: IT_MODE_FIFO | IT_MODE_KEEP</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method_setIteratorMode#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RangeException">RangeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if an invalid <code class="prettyprint">$mode</code> is given</p>
-</section>
-
-                                    </dd>
-                            <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if trying to change iterator direction</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">int</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The set of flags and modes of iteration</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_shift">
-        shift()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_shift" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">590</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.590" class="phpdocumentor-element-found-in__source" data-line="590" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Shift an item from the beginning of the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">shift</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_shift#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The first item of the list</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -2438,22 +1182,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_toArray">
         toArray()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toArray" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">602</span>
+    <span class="phpdocumentor-element-found-in__line">280</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.602" class="phpdocumentor-element-found-in__source" data-line="602" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.280" class="phpdocumentor-element-found-in__source" data-line="280" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Return array representation of list.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">toArray</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">array&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span></code>
+                    <span class="phpdocumentor-signature__name">toArray</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">array&lt;int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2465,73 +1209,13 @@ Possible values are:</p>
 
             <section>
         <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">array&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span>
+        <span class="phpdocumentor-signature__response_type">array&lt;int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span>
                     &mdash;
                 <section class="phpdocumentor-description"><p>Array of list items</p>
 </section>
 
             </section>
 
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_top">
-        top()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_top" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">632</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.632" class="phpdocumentor-element-found-in__source" data-line="632" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Peek at the item at the end of the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">top</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_top#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The last item of the list</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -2541,22 +1225,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_toStrictCollection">
         toStrictCollection()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toStrictCollection" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">614</span>
+    <span class="phpdocumentor-element-found-in__line">292</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.614" class="phpdocumentor-element-found-in__source" data-line="614" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.292" class="phpdocumentor-element-found-in__source" data-line="292" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Turn list into a type-sensitive collection.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">toStrictCollection</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span></code>
+                    <span class="phpdocumentor-signature__name">toStrictCollection</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2568,7 +1252,7 @@ Possible values are:</p>
 
             <section>
         <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span>
+        <span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span>
                     &mdash;
                 <section class="phpdocumentor-description"><p>A type-sensitive collection of the list's items</p>
 </section>
@@ -2584,22 +1268,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_unshift">
         unshift()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_unshift" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">664</span>
+    <span class="phpdocumentor-element-found-in__line">328</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.664" class="phpdocumentor-element-found-in__source" data-line="664" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.328" class="phpdocumentor-element-found-in__source" data-line="328" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Prepend the list with an item.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">unshift</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">unshift</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2610,7 +1294,7 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The item to unshift</p>
@@ -2622,7 +1306,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_unshift#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -2630,7 +1314,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -2639,111 +1323,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_valid">
-        valid()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_valid" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">684</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.684" class="phpdocumentor-element-found-in__source" data-line="684" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if current cursor position is valid.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">valid</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the current cursor position is valid</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -protected
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_setAllowedTypes">
-        setAllowedTypes()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">535</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictQueue.html#source-view.535" class="phpdocumentor-element-found-in__source" data-line="535" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Set allowed data types of list items.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">protected</span>
-                    <span class="phpdocumentor-signature__name">setAllowedTypes</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;&nbsp;</span><span class="phpdocumentor-signature__argument__name">$allowedTypes</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">[]</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$allowedTypes</span>
-                : <span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;</span>
-                 = <span class="phpdocumentor-signature__argument__default-value">[]</span>            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>Allowed data types of items</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if any value of <code class="prettyprint">$allowedTypes</code> is not a string</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-    
 </article>
             </section>
 
@@ -2850,59 +1429,29 @@ Possible values are:</p>
             <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
             <li>
                 <ul class="phpdocumentor-list -clean">
-                                                            <li><a href="classes/OCC-Basics-DataStructures-StrictQueue.html#toc-properties">Properties</a></li>
-                                                            <li><a href="classes/OCC-Basics-DataStructures-StrictQueue.html#toc-methods">Methods</a></li>
+                                                                                <li><a href="classes/OCC-Basics-DataStructures-StrictQueue.html#toc-methods">Methods</a></li>
                                     </ul>
             </li>
             
-                            <li class="phpdocumentor-on-this-page-section__title">Properties</li>
-                <li>
-                    <ul class="phpdocumentor-list -clean">
-                                                    <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#property_allowedTypes">$allowedTypes<a href="classes/OCC-Basics-DataStructures-StrictQueue.html"></li>
-                                            </ul>
-                </li>
             
                         <li class="phpdocumentor-on-this-page-section__title">Methods</li>
             <li>
                 <ul class="phpdocumentor-list -clean">
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method___construct">__construct()</a></li>
-                                            <li><a href="classes/OCC-Basics-Traits-Getter.html#method___get">__get()</a></li>
-                                            <li><a href="classes/OCC-Basics-Traits-Getter.html#method___isset">__isset()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_add">add()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_append">append()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_bottom">bottom()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_clear">clear()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_count">count()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_current">current()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method_dequeue">dequeue()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct">__construct()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add">add()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append">append()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear">clear()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method_enqueue">enqueue()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_get">get()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getAllowedTypes">getAllowedTypes()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getIteratorMode">getIteratorMode()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isAllowedType">isAllowedType()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isEmpty">isEmpty()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isList">isList()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_key">key()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_next">next()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetExists">offsetExists()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet">offsetGet()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet">offsetSet()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset">offsetUnset()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_pop">pop()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prepend">prepend()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prev">prev()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_push">push()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_remove">remove()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_rewind">rewind()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_set">set()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictQueue.html#method_setIteratorMode">setIteratorMode()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_shift">shift()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toArray">toArray()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_top">top()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toStrictCollection">toStrictCollection()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_unshift">unshift()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_valid">valid()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes">setAllowedTypes()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get">get()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList">isList()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet">offsetSet()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend">prepend()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push">push()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove">remove()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set">set()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray">toArray()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection">toStrictCollection()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift">unshift()</a></li>
                                     </ul>
             </li>
                     </ul>
diff --git a/doc/classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html b/doc/classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html
new file mode 100644
index 0000000..2552eec
--- /dev/null
+++ b/doc/classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html
@@ -0,0 +1,1390 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PHP Basics</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PHP Basics</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-basics.html" class="">Basics</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/Basics.html" class="">Basics</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="packages/Basics-DataStructures.html" class="">DataStructures</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-ErrorHandlers.html" class="">ErrorHandlers</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-Interfaces.html" class="">Interfaces</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-Traits.html" class="">Traits</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ.html">OCC</a></li>
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ-basics.html">Basics</a></li>
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ-basics-datastructures.html">DataStructures</a></li>
+    </ul>
+
+    <article class="phpdocumentor-element -trait">
+        <h2 class="phpdocumentor-content__title">
+    StrictSplDatastructureTrait
+    </h2>
+
+        <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">48</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.48" class="phpdocumentor-element-found-in__source" data-line="48" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+            <p class="phpdocumentor-summary">The common interface of all type-sensitive, SPL-based datastructures.</p>
+
+    <section class="phpdocumentor-description"><p>This extends all methods of the common interface of the Standard PHP Library
+<a href="https://www.php.net/spl.datastructures">Doubly Linked List Datastructures</a>
+by type-checking to only allow specified data types on the list.</p>
+</section>
+
+
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">author</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                                
+                                                 <section class="phpdocumentor-description"><p>Sebastian Meyer <a href="mailto:sebastian.meyer@opencultureconsulting.com">sebastian.meyer@opencultureconsulting.com</a></p>
+</section>
+
+                                    </dd>
+                                                <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">template</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                                
+                                                 <section class="phpdocumentor-description"><p>AllowedType of mixed</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+
+
+<h3 id="toc">
+    Table of Contents
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+
+
+
+
+
+
+<h4 id="toc-methods">
+    Methods
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#toc-methods" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h4>
+<dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method___construct">__construct()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Create a type-sensitive, traversable list of items.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_add">add()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Add/insert a new item at the specified offset.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_append">append()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Append items at the end of the list.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_clear">clear()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Clear the list of any items.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_get">get()</a>
+    <span>
+                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
+</dt>
+<dd>Get the item at the specified index.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_isList">isList()</a>
+    <span>
+                                &nbsp;: true    </span>
+</dt>
+<dd>Check if this can be considered a list.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_offsetSet">offsetSet()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Set the item at the specified offset.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_prepend">prepend()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Prepend items at the start of the list.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_push">push()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Push an item at the end of the list.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_remove">remove()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Remove an item from the list.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_set">set()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Set an item at the specified index.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_toArray">toArray()</a>
+    <span>
+                                &nbsp;: array&lt;int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;    </span>
+</dt>
+<dd>Return array representation of list.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_toStrictCollection">toStrictCollection()</a>
+    <span>
+                                &nbsp;: <a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;    </span>
+</dt>
+<dd>Turn list into a type-sensitive collection.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_unshift">unshift()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Prepend the list with an item.</dd>
+
+    </dl>
+
+
+
+
+        
+
+        
+
+            <section class="phpdocumentor-methods">
+        <h3 class="phpdocumentor-elements__header" id="methods">
+            Methods
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#methods" class="headerlink"><i class="fas fa-link"></i></a>
+
+        </h3>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method___construct">
+        __construct()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method___construct" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">364</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.364" class="phpdocumentor-element-found-in__source" data-line="364" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Create a type-sensitive, traversable list of items.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">__construct</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;&nbsp;</span><span class="phpdocumentor-signature__argument__name">$allowedTypes</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">[]</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$allowedTypes</span>
+                : <span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;</span>
+                 = <span class="phpdocumentor-signature__argument__default-value">[]</span>            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>Allowed data types of items (optional)</p>
+<p>If empty, all types are allowed.
+Possible values are:</p>
+<ul>
+<li>&quot;array&quot;</li>
+<li>&quot;bool&quot;</li>
+<li>&quot;callable&quot;</li>
+<li>&quot;countable&quot;</li>
+<li>&quot;float&quot; or &quot;double&quot;</li>
+<li>&quot;int&quot; or &quot;integer&quot; or &quot;long&quot;</li>
+<li>&quot;iterable&quot;</li>
+<li>&quot;null&quot;</li>
+<li>&quot;numeric&quot;</li>
+<li>&quot;object&quot; or FQCN</li>
+<li>&quot;resource&quot;</li>
+<li>&quot;scalar&quot;</li>
+<li>&quot;string&quot;</li>
+</ul>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method___construct#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if any value of <code class="prettyprint">$allowedTypes</code> is not a string</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_add">
+        add()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_add" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">67</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.67" class="phpdocumentor-element-found-in__source" data-line="67" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Add/insert a new item at the specified offset.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">add</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$offset</span>
+                : <span class="phpdocumentor-signature__argument__return-type">int</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The offset where the new item is to be inserted</p>
+</section>
+
+            </dd>
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$value</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The new item for the offset</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_add#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                            <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_append">
+        append()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_append" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">83</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.83" class="phpdocumentor-element-found-in__source" data-line="83" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Append items at the end of the list.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">append</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$values</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>One or more items to append</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_append#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if any <code class="prettyprint">$values</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_clear">
+        clear()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_clear" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">109</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.109" class="phpdocumentor-element-found-in__source" data-line="109" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Clear the list of any items.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">clear</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+    
+    
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_get">
+        get()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_get" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">128</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.128" class="phpdocumentor-element-found-in__source" data-line="128" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Get the item at the specified index.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$offset</span>
+                : <span class="phpdocumentor-signature__argument__return-type">int</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The item's index</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_get#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>The item</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_isList">
+        isList()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_isList" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">140</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.140" class="phpdocumentor-element-found-in__source" data-line="140" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Check if this can be considered a list.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">isList</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">true</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+    
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type">true</span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>Always TRUE (this exists only for compatibility reasons)</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_offsetSet">
+        offsetSet()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_offsetSet" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">158</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.158" class="phpdocumentor-element-found-in__source" data-line="158" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Set the item at the specified offset.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">offsetSet</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int|null&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$offset</span>
+                : <span class="phpdocumentor-signature__argument__return-type">int|null</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The offset being set or NULL to append</p>
+</section>
+
+            </dd>
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$value</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The new item for the offset</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_offsetSet#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                            <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_prepend">
+        prepend()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_prepend" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">183</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.183" class="phpdocumentor-element-found-in__source" data-line="183" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Prepend items at the start of the list.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">prepend</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$values</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>One or more items to prepend</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_prepend#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_push">
+        push()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_push" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">213</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.213" class="phpdocumentor-element-found-in__source" data-line="213" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Push an item at the end of the list.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">push</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$value</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The item to push</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_push#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_remove">
+        remove()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_remove" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">237</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.237" class="phpdocumentor-element-found-in__source" data-line="237" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Remove an item from the list.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">remove</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$offset</span>
+                : <span class="phpdocumentor-signature__argument__return-type">int</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The item's index</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_remove#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_set">
+        set()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_set" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">266</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.266" class="phpdocumentor-element-found-in__source" data-line="266" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Set an item at the specified index.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">set</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$offset</span>
+                : <span class="phpdocumentor-signature__argument__return-type">int</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The item's index</p>
+</section>
+
+            </dd>
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$value</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The item</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_set#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_toArray">
+        toArray()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_toArray" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">278</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.278" class="phpdocumentor-element-found-in__source" data-line="278" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Return array representation of list.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">toArray</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">array&lt;int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+    
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type">array&lt;int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>Array of list items</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_toStrictCollection">
+        toStrictCollection()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_toStrictCollection" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">290</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.290" class="phpdocumentor-element-found-in__source" data-line="290" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Turn list into a type-sensitive collection.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">toStrictCollection</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+    
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>A type-sensitive collection of the list's items</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_unshift">
+        unshift()
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_unshift" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-strictspldatastructuretrait.html"><abbr title="src/DataStructures/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">326</span>
+
+            <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#source-view.326" class="phpdocumentor-element-found-in__source" data-line="326" data-modal="source-view" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Prepend the list with an item.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">unshift</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$value</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The item to unshift</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_unshift#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+            </section>
+
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="files/src/DataStructures/StrictSplDatastructureTrait.php.txt" class="language-php line-numbers linkable-line-numbers"></pre>
+        </div>
+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
+    </div>
+</div>
+
+    <script type="text/javascript">
+        (function () {
+            function loadExternalCodeSnippet(el, url, line) {
+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
+                    const code = document.createElement('code');
+                    code.className = 'language-' + language;
+                    pre.textContent = '';
+                    pre.setAttribute('data-line', line)
+                    code.textContent = 'Loading…';
+                    pre.appendChild(code);
+
+                    var xhr = new XMLHttpRequest();
+
+                    xhr.open('GET', src, true);
+
+                    xhr.onreadystatechange = function () {
+                        if (xhr.readyState !== 4) {
+                            return;
+                        }
+
+                        if (xhr.status < 400 && xhr.responseText) {
+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
+                        }
+
+                        if (xhr.status >= 400) {
+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
+                        }
+
+                        code.textContent = '✖ Error: An unknown error occurred';
+                    };
+
+                    xhr.send(null);
+                });
+            }
+
+            const modalButtons = document.querySelectorAll("[data-modal]");
+            const openedAsLocalFile = window.location.protocol === 'file:';
+            if (modalButtons.length > 0 && openedAsLocalFile) {
+                console.warn(
+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
+                );
+            }
+
+            modalButtons.forEach(function (trigger) {
+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
+                }
+
+                trigger.addEventListener("click", function (event) {
+                    event.preventDefault();
+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
+                        return;
+                    }
+                    modal.classList.add("phpdocumentor-modal__open");
+
+                    loadExternalCodeSnippet(modal, trigger.dataset.src || null, trigger.dataset.line)
+                    const exits = modal.querySelectorAll("[data-exit-button]");
+                    exits.forEach(function (exit) {
+                        exit.addEventListener("click", function (event) {
+                            event.preventDefault();
+                            modal.classList.remove("phpdocumentor-modal__open");
+                        });
+                    });
+                });
+            });
+        })();
+    </script>
+
+    </article>
+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                                
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#toc-methods">Methods</a></li>
+                                    </ul>
+            </li>
+                                                <li class="phpdocumentor-on-this-page-section__title">Methods</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method___construct">__construct()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_add">add()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_append">append()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_clear">clear()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_get">get()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_isList">isList()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_offsetSet">offsetSet()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_prepend">prepend()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_push">push()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_remove">remove()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_set">set()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_toArray">toArray()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_toStrictCollection">toStrictCollection()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#method_unshift">unshift()</a></li>
+                                    </ul>
+            </li>
+                    </ul>
+    </section>
+
+                </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>
diff --git a/doc/classes/OCC-Basics-DataStructures-StrictStack.html b/doc/classes/OCC-Basics-DataStructures-StrictStack.html
index a0c75a1..b101e45 100644
--- a/doc/classes/OCC-Basics-DataStructures-StrictStack.html
+++ b/doc/classes/OCC-Basics-DataStructures-StrictStack.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -161,7 +179,7 @@
     StrictStack
 
         <span class="phpdocumentor-element__extends">
-        extends <a href="classes/OCC-Basics-DataStructures-StrictList.html"><abbr title="\OCC\Basics\DataStructures\StrictList">StrictList</abbr></a>
+        extends <abbr title="\SplStack">SplStack</abbr>
     </span>
     
             <div class="phpdocumentor-element__package">
@@ -172,10 +190,10 @@
                             </ul>
         </div>
     
-            <span class="phpdocumentor-element__implements">
-            implements
-                            <abbr title="\ArrayAccess">ArrayAccess</abbr>,                             <abbr title="\Countable">Countable</abbr>,                             <abbr title="\Iterator">Iterator</abbr>,                             <abbr title="\Serializable">Serializable</abbr>                    </span>
     
+            <span class="phpdocumentor-element__extends">
+            Uses
+                            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html"><abbr title="\OCC\Basics\DataStructures\Traits\StrictSplDatastructureTrait">StrictSplDatastructureTrait</abbr></a>                    </span>
     </h2>
 
 <div class="phpdocumentor-label-line">
@@ -186,18 +204,16 @@
         <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictStack.php"><a href="files/src-datastructures-strictstack.html"><abbr title="src/DataStructures/StrictStack.php">StrictStack.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">55</span>
+    <span class="phpdocumentor-element-found-in__line">46</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.55" class="phpdocumentor-element-found-in__source" data-line="55" data-modal="source-view" data-src="files/src/DataStructures/StrictStack.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.46" class="phpdocumentor-element-found-in__source" data-line="46" data-modal="source-view" data-src="files/src/DataStructures/StrictStack.php.txt"></a>
     </aside>
 
             <p class="phpdocumentor-summary">A type-sensitive, taversable stack (LIFO).</p>
 
-    <section class="phpdocumentor-description"><p>Extends <a href="https://www.php.net/spldoublylinkedlist">\SplDoublyLinkedList</a> with
-an option to restrict the allowed data types for list items by providing the
-constructor with an array of atomic types or fully qualified class names. It
-also restricts the iterator direction to last-in, first-out (LIFO) exactly
-like <a href="https://www.php.net/splstack">\SplStack</a>.</p>
+    <section class="phpdocumentor-description"><p>Extends <a href="https://www.php.net/splstack">\SplStack</a> with an option to restrict
+the allowed data types for list items by providing the constructor with an
+array of atomic types or fully qualified class names.</p>
 </section>
 
 
@@ -237,32 +253,12 @@ like <a href="https://www.php.net/splstack">\SplStack</a>.</p>
 
 
 
-    <h4 id="toc-interfaces">
-        Interfaces
-        <a href="classes/OCC-Basics-DataStructures-StrictStack.html#toc-interfaces" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <dl class="phpdocumentor-table-of-contents">
-                    <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\ArrayAccess">ArrayAccess</abbr></dt>            <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\Countable">Countable</abbr></dt>            <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\Iterator">Iterator</abbr></dt>            <dt class="phpdocumentor-table-of-contents__entry -interface"><abbr title="\Serializable">Serializable</abbr></dt>    </dl>
 
 
 
 
 
 
-<h4 id="toc-properties">
-    Properties
-    <a href="classes/OCC-Basics-DataStructures-StrictStack.html#toc-properties" class="headerlink"><i class="fas fa-link"></i></a>
-
-</h4>
-<dl class="phpdocumentor-table-of-contents">
-            <dt class="phpdocumentor-table-of-contents__entry -property -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#property_allowedTypes">$allowedTypes</a>
-    <span>
-                        &nbsp;: array&lt;string|int, string&gt;            </span>
-</dt>
-
-    </dl>
 
 <h4 id="toc-methods">
     Methods
@@ -271,215 +267,82 @@ like <a href="https://www.php.net/splstack">\SplStack</a>.</p>
 </h4>
 <dl class="phpdocumentor-table-of-contents">
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictStack.html#method___construct">__construct()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct">__construct()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
-<dd>Create a type-sensitive, traversable stack of items.</dd>
+<dd>Create a type-sensitive, traversable list of items.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-Traits-Getter.html#method___get">__get()</a>
-    <span>
-                                &nbsp;: mixed    </span>
-</dt>
-<dd>Read data from an inaccessible property.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-Traits-Getter.html#method___isset">__isset()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if an inaccessible property is set and not empty.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_add">add()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add">add()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Add/insert a new item at the specified offset.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_append">append()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append">append()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Append items at the end of the list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_bottom">bottom()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Peek at the item at the beginning of the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_clear">clear()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear">clear()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Clear the list of any items.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_count">count()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get">get()</a>
     <span>
-                                &nbsp;: int    </span>
-</dt>
-<dd>Get the number of items on the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_current">current()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Get the current list item.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_get">get()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
+                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>    </span>
 </dt>
 <dd>Get the item at the specified index.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getAllowedTypes">getAllowedTypes()</a>
-    <span>
-                                &nbsp;: array&lt;string|int, string&gt;    </span>
-</dt>
-<dd>Get allowed data types for list items.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getIteratorMode">getIteratorMode()</a>
-    <span>
-                                &nbsp;: int    </span>
-</dt>
-<dd>Get the mode of iteration.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isAllowedType">isAllowedType()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if the item&#039;s data type is allowed on the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isEmpty">isEmpty()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if list is empty.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isList">isList()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList">isList()</a>
     <span>
                                 &nbsp;: true    </span>
 </dt>
 <dd>Check if this can be considered a list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_key">key()</a>
-    <span>
-                                &nbsp;: int    </span>
-</dt>
-<dd>Get the current list index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_next">next()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Move the cursor to the next list index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetExists">offsetExists()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if the specified index exists and is not empty.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet">offsetGet()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Get the item from the specified index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet">offsetSet()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet">offsetSet()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Set the item at the specified offset.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset">offsetUnset()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Unset the item at the specified index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_pop">pop()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Pops an item from the end of the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prepend">prepend()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend">prepend()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Prepend items at the start of the list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prev">prev()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Move the cursor to the previous list index.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_push">push()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push">push()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Push an item at the end of the list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_remove">remove()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove">remove()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Remove an item from the list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_rewind">rewind()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Rewind the iterator&#039;s cursor.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_set">set()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set">set()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
 <dd>Set an item at the specified index.</dd>
 
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictStack.html#method_setIteratorMode">setIteratorMode()</a>
-    <span>
-                                &nbsp;: int    </span>
-</dt>
-<dd>Set the mode of iteration.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_shift">shift()</a>
-    <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Shift an item from the beginning of the list.</dd>
-
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
     <a href="classes/OCC-Basics-DataStructures-StrictStack.html#method_stack">stack()</a>
     <span>
@@ -488,28 +351,21 @@ like <a href="https://www.php.net/splstack">\SplStack</a>.</p>
 <dd>Add an item to the stack.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toArray">toArray()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray">toArray()</a>
     <span>
-                                &nbsp;: array&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;    </span>
+                                &nbsp;: array&lt;int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;    </span>
 </dt>
 <dd>Return array representation of list.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_top">top()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection">toStrictCollection()</a>
     <span>
-                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>    </span>
-</dt>
-<dd>Peek at the item at the end of the list.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toStrictCollection">toStrictCollection()</a>
-    <span>
-                                &nbsp;: <a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;    </span>
+                                &nbsp;: <a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;    </span>
 </dt>
 <dd>Turn list into a type-sensitive collection.</dd>
 
             <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_unshift">unshift()</a>
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift">unshift()</a>
     <span>
                                 &nbsp;: void    </span>
 </dt>
@@ -522,20 +378,6 @@ like <a href="https://www.php.net/splstack">\SplStack</a>.</p>
 </dt>
 <dd>Unstack an item from the stack.</dd>
 
-            <dt class="phpdocumentor-table-of-contents__entry -method -public">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_valid">valid()</a>
-    <span>
-                                &nbsp;: bool    </span>
-</dt>
-<dd>Check if current cursor position is valid.</dd>
-
-            <dt class="phpdocumentor-table-of-contents__entry -method -protected">
-    <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes">setAllowedTypes()</a>
-    <span>
-                                &nbsp;: void    </span>
-</dt>
-<dd>Set allowed data types of list items.</dd>
-
     </dl>
 
 
@@ -544,49 +386,6 @@ like <a href="https://www.php.net/splstack">\SplStack</a>.</p>
         
 
         
-    <section class="phpdocumentor-properties">
-        <h3 class="phpdocumentor-elements__header" id="properties">
-            Properties
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#properties" class="headerlink"><i class="fas fa-link"></i></a>
-
-        </h3>
-                    <article
-        class="
-            phpdocumentor-element
-            -property
-            -public
-                                                -read-only        "
->
-    <h4 class="phpdocumentor-element__name" id="property_allowedTypes">
-        $allowedTypes
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#property_allowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
-
-        <span class="phpdocumentor-element__modifiers">
-                        <small class="phpdocumentor-element__modifier">read-only</small>        </span>
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">0</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.0" class="phpdocumentor-element-found-in__source" data-line="0" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-    
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-        <span class="phpdocumentor-signature__type">array&lt;string|int, string&gt;</span>
-    <span class="phpdocumentor-signature__name">$allowedTypes</span>
-    </code>
-
-        <section class="phpdocumentor-description"><p>The allowed data types for values.</p>
-</section>
-
-    
-    
-
-</article>
-            </section>
 
             <section class="phpdocumentor-methods">
         <h3 class="phpdocumentor-elements__header" id="methods">
@@ -602,18 +401,18 @@ like <a href="https://www.php.net/splstack">\SplStack</a>.</p>
 >
     <h4 class="phpdocumentor-element__name" id="method___construct">
         __construct()
-        <a href="classes/OCC-Basics-DataStructures-StrictStack.html#method___construct" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictStack.php"><a href="files/src-datastructures-strictstack.html"><abbr title="src/DataStructures/StrictStack.php">StrictStack.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">146</span>
+    <span class="phpdocumentor-element-found-in__line">366</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.146" class="phpdocumentor-element-found-in__source" data-line="146" data-modal="source-view" data-src="files/src/DataStructures/StrictStack.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.366" class="phpdocumentor-element-found-in__source" data-line="366" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
-        <p class="phpdocumentor-summary">Create a type-sensitive, traversable stack of items.</p>
+        <p class="phpdocumentor-summary">Create a type-sensitive, traversable list of items.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
@@ -655,7 +454,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictStack.html#method___construct#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -672,129 +471,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method___get">
-        __get()
-        <a href="classes/OCC-Basics-Traits-Getter.html#method___get" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/Getter.php"><a href="files/src-traits-getter.html"><abbr title="src/Traits/Getter.php">Getter.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">60</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.60" class="phpdocumentor-element-found-in__source" data-line="60" data-modal="source-view" data-src="files/src/Traits/Getter.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Read data from an inaccessible property.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">__get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">string&nbsp;</span><span class="phpdocumentor-signature__argument__name">$property</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">mixed</span></code>
-
-    <div class="phpdocumentor-label-line">
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$property</span>
-                : <span class="phpdocumentor-signature__argument__return-type">string</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The class property to get</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-Traits-Getter.html#method___get#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the property or getter method do not exist</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">mixed</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The class property's current value</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method___isset">
-        __isset()
-        <a href="classes/OCC-Basics-Traits-Getter.html#method___isset" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/Getter.php"><a href="files/src-traits-getter.html"><abbr title="src/Traits/Getter.php">Getter.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">83</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.83" class="phpdocumentor-element-found-in__source" data-line="83" data-modal="source-view" data-src="files/src/Traits/Getter.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if an inaccessible property is set and not empty.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">__isset</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">string&nbsp;</span><span class="phpdocumentor-signature__argument__name">$property</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$property</span>
-                : <span class="phpdocumentor-signature__argument__return-type">string</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The class property to check</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the class property is set and not empty</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -804,22 +480,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_add">
         add()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_add" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">112</span>
+    <span class="phpdocumentor-element-found-in__line">69</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.112" class="phpdocumentor-element-found-in__source" data-line="112" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.69" class="phpdocumentor-element-found-in__source" data-line="69" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Add/insert a new item at the specified offset.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">add</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">add</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -839,7 +515,7 @@ Possible values are:</p>
             </dd>
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The new item for the offset</p>
@@ -851,7 +527,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_add#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -859,7 +535,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -887,22 +563,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_append">
         append()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_append" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">128</span>
+    <span class="phpdocumentor-element-found-in__line">85</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.128" class="phpdocumentor-element-found-in__source" data-line="128" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.85" class="phpdocumentor-element-found-in__source" data-line="85" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Append items at the end of the list.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">append</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">append</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -913,7 +589,7 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$values</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>One or more items to append</p>
@@ -925,7 +601,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_append#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -933,7 +609,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if any <code class="prettyprint">$values</code> is not of allowed type</p>
 </section>
@@ -942,66 +618,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_bottom">
-        bottom()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_bottom" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">156</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.156" class="phpdocumentor-element-found-in__source" data-line="156" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Peek at the item at the beginning of the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">bottom</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_bottom#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The first item of the list</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1011,15 +627,15 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_clear">
         clear()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_clear" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">168</span>
+    <span class="phpdocumentor-element-found-in__line">111</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.168" class="phpdocumentor-element-found-in__source" data-line="168" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.111" class="phpdocumentor-element-found-in__source" data-line="111" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Clear the list of any items.</p>
@@ -1037,92 +653,6 @@ Possible values are:</p>
     
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_count">
-        count()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_count" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">183</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.183" class="phpdocumentor-element-found-in__source" data-line="183" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the number of items on the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">count</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">int</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">int</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The number of items on the list</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_current">
-        current()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_current" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">195</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.195" class="phpdocumentor-element-found-in__source" data-line="195" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the current list item.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">current</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The current item</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1132,22 +662,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_get">
         get()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_get" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">211</span>
+    <span class="phpdocumentor-element-found-in__line">130</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.211" class="phpdocumentor-element-found-in__source" data-line="211" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.130" class="phpdocumentor-element-found-in__source" data-line="130" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Get the item at the specified index.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
+                    <span class="phpdocumentor-signature__name">get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -1170,7 +700,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_get#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -1188,197 +718,13 @@ Possible values are:</p>
 
             <section>
         <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                     &mdash;
                 <section class="phpdocumentor-description"><p>The item</p>
 </section>
 
             </section>
 
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_getAllowedTypes">
-        getAllowedTypes()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getAllowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">223</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.223" class="phpdocumentor-element-found-in__source" data-line="223" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get allowed data types for list items.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">getAllowedTypes</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">array&lt;string|int, string&gt;</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">array&lt;string|int, string&gt;</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The list of allowed data types</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_getIteratorMode">
-        getIteratorMode()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getIteratorMode" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">235</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.235" class="phpdocumentor-element-found-in__source" data-line="235" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the mode of iteration.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">getIteratorMode</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">int</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">int</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The set of flags and modes of iteration</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_isAllowedType">
-        isAllowedType()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isAllowedType" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">249</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.249" class="phpdocumentor-element-found-in__source" data-line="249" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if the item&#039;s data type is allowed on the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">isAllowedType</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The item to check</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the item's data type is allowed</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_isEmpty">
-        isEmpty()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isEmpty" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">275</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.275" class="phpdocumentor-element-found-in__source" data-line="275" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if list is empty.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">isEmpty</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the list contains no items</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1388,15 +734,15 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_isList">
         isList()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isList" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">287</span>
+    <span class="phpdocumentor-element-found-in__line">142</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.287" class="phpdocumentor-element-found-in__source" data-line="287" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.142" class="phpdocumentor-element-found-in__source" data-line="142" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Check if this can be considered a list.</p>
@@ -1422,211 +768,6 @@ Possible values are:</p>
 
             </section>
 
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_key">
-        key()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_key" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">299</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.299" class="phpdocumentor-element-found-in__source" data-line="299" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the current list index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">key</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">int</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">int</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The current list index</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_next">
-        next()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_next" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">311</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.311" class="phpdocumentor-element-found-in__source" data-line="311" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Move the cursor to the next list index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">next</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-    
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_offsetExists">
-        offsetExists()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetExists" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">325</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.325" class="phpdocumentor-element-found-in__source" data-line="325" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if the specified index exists and is not empty.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">offsetExists</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$offset</span>
-                : <span class="phpdocumentor-signature__argument__return-type">int</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The index to check</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the index exists and is not empty</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_offsetGet">
-        offsetGet()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">341</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.341" class="phpdocumentor-element-found-in__source" data-line="341" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Get the item from the specified index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">offsetGet</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$offset</span>
-                : <span class="phpdocumentor-signature__argument__return-type">int</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The item's index</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The item</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1636,22 +777,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_offsetSet">
         offsetSet()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">359</span>
+    <span class="phpdocumentor-element-found-in__line">160</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.359" class="phpdocumentor-element-found-in__source" data-line="359" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.160" class="phpdocumentor-element-found-in__source" data-line="160" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Set the item at the specified offset.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">offsetSet</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int|null&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">offsetSet</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int|null&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -1671,7 +812,7 @@ Possible values are:</p>
             </dd>
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The new item for the offset</p>
@@ -1683,7 +824,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -1691,7 +832,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -1710,130 +851,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_offsetUnset">
-        offsetUnset()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">384</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.384" class="phpdocumentor-element-found-in__source" data-line="384" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Unset the item at the specified index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">offsetUnset</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$offset</span>
-                : <span class="phpdocumentor-signature__argument__return-type">int</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The item's index</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-    
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_pop">
-        pop()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_pop" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">398</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.398" class="phpdocumentor-element-found-in__source" data-line="398" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Pops an item from the end of the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">pop</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_pop#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The item from the end of the list</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -1843,22 +860,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_prepend">
         prepend()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prepend" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">414</span>
+    <span class="phpdocumentor-element-found-in__line">185</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.414" class="phpdocumentor-element-found-in__source" data-line="414" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.185" class="phpdocumentor-element-found-in__source" data-line="185" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Prepend items at the start of the list.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">prepend</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">prepend</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -1869,7 +886,7 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$values</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>One or more items to prepend</p>
@@ -1881,7 +898,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prepend#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -1889,7 +906,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -1898,41 +915,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_prev">
-        prev()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prev" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">440</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.440" class="phpdocumentor-element-found-in__source" data-line="440" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Move the cursor to the previous list index.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">prev</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-    
 </article>
                     <article
         class="phpdocumentor-element
@@ -1942,22 +924,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_push">
         push()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_push" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">456</span>
+    <span class="phpdocumentor-element-found-in__line">215</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.456" class="phpdocumentor-element-found-in__source" data-line="456" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.215" class="phpdocumentor-element-found-in__source" data-line="215" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Push an item at the end of the list.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">push</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">push</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -1968,7 +950,7 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The item to push</p>
@@ -1980,7 +962,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_push#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -1988,7 +970,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -2006,15 +988,15 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_remove">
         remove()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_remove" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">480</span>
+    <span class="phpdocumentor-element-found-in__line">239</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.480" class="phpdocumentor-element-found-in__source" data-line="480" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.239" class="phpdocumentor-element-found-in__source" data-line="239" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Remove an item from the list.</p>
@@ -2044,7 +1026,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_remove#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -2061,41 +1043,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_rewind">
-        rewind()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_rewind" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">492</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.492" class="phpdocumentor-element-found-in__source" data-line="492" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Rewind the iterator&#039;s cursor.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">rewind</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-    
 </article>
                     <article
         class="phpdocumentor-element
@@ -2105,22 +1052,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_set">
         set()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_set" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">521</span>
+    <span class="phpdocumentor-element-found-in__line">268</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.521" class="phpdocumentor-element-found-in__source" data-line="521" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.268" class="phpdocumentor-element-found-in__source" data-line="268" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Set an item at the specified index.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">set</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">set</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2140,7 +1087,7 @@ Possible values are:</p>
             </dd>
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The item</p>
@@ -2152,7 +1099,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_set#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -2160,7 +1107,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -2169,159 +1116,6 @@ Possible values are:</p>
                                             </dl>
 
     
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                -final        "
->
-    <h4 class="phpdocumentor-element__name" id="method_setIteratorMode">
-        setIteratorMode()
-        <a href="classes/OCC-Basics-DataStructures-StrictStack.html#method_setIteratorMode" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictStack.php"><a href="files/src-datastructures-strictstack.html"><abbr title="src/DataStructures/StrictStack.php">StrictStack.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">108</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.108" class="phpdocumentor-element-found-in__source" data-line="108" data-modal="source-view" data-src="files/src/DataStructures/StrictStack.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Set the mode of iteration.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-        <span class="phpdocumentor-signature__final">final</span>            <span class="phpdocumentor-signature__name">setIteratorMode</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$mode</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">int</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$mode</span>
-                : <span class="phpdocumentor-signature__argument__return-type">int</span>
-                            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>The new iterator mode (2 or 3)</p>
-<p>There are two orthogonal sets of modes that can be set.</p>
-<p>The direction of iteration (fixed for StrictStack):</p>
-<ul>
-<li>StrictStack::IT_MODE_LIFO (stack style)</li>
-</ul>
-<p>The behavior of the iterator (either one or the other):</p>
-<ul>
-<li>StrictStack::IT_MODE_DELETE (delete items)</li>
-<li>StrictStack::IT_MODE_KEEP (keep items)</li>
-</ul>
-<p>The default mode is: IT_MODE_LIFO | IT_MODE_KEEP</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictStack.html#method_setIteratorMode#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RangeException">RangeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if an invalid <code class="prettyprint">$mode</code> is given</p>
-</section>
-
-                                    </dd>
-                            <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if trying to change iterator direction</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">int</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The set of flags and modes of iteration</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_shift">
-        shift()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_shift" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">590</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.590" class="phpdocumentor-element-found-in__source" data-line="590" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Shift an item from the beginning of the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">shift</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_shift#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The first item of the list</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -2337,9 +1131,9 @@ Possible values are:</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictStack.php"><a href="files/src-datastructures-strictstack.html"><abbr title="src/DataStructures/StrictStack.php">StrictStack.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">68</span>
+    <span class="phpdocumentor-element-found-in__line">62</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.68" class="phpdocumentor-element-found-in__source" data-line="68" data-modal="source-view" data-src="files/src/DataStructures/StrictStack.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.62" class="phpdocumentor-element-found-in__source" data-line="62" data-modal="source-view" data-src="files/src/DataStructures/StrictStack.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Add an item to the stack.</p>
@@ -2377,7 +1171,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -2395,22 +1189,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_toArray">
         toArray()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toArray" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">602</span>
+    <span class="phpdocumentor-element-found-in__line">280</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.602" class="phpdocumentor-element-found-in__source" data-line="602" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.280" class="phpdocumentor-element-found-in__source" data-line="280" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Return array representation of list.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">toArray</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">array&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span></code>
+                    <span class="phpdocumentor-signature__name">toArray</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">array&lt;int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2422,73 +1216,13 @@ Possible values are:</p>
 
             <section>
         <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">array&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span>
+        <span class="phpdocumentor-signature__response_type">array&lt;int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span>
                     &mdash;
                 <section class="phpdocumentor-description"><p>Array of list items</p>
 </section>
 
             </section>
 
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_top">
-        top()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_top" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">632</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.632" class="phpdocumentor-element-found-in__source" data-line="632" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Peek at the item at the end of the list.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">top</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_top#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>The last item of the list</p>
-</section>
-
-            </section>
-
 </article>
                     <article
         class="phpdocumentor-element
@@ -2498,22 +1232,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_toStrictCollection">
         toStrictCollection()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toStrictCollection" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">614</span>
+    <span class="phpdocumentor-element-found-in__line">292</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.614" class="phpdocumentor-element-found-in__source" data-line="614" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.292" class="phpdocumentor-element-found-in__source" data-line="292" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Turn list into a type-sensitive collection.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">toStrictCollection</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span></code>
+                    <span class="phpdocumentor-signature__name">toStrictCollection</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2525,7 +1259,7 @@ Possible values are:</p>
 
             <section>
         <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&gt;</span>
+        <span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span>
                     &mdash;
                 <section class="phpdocumentor-description"><p>A type-sensitive collection of the list's items</p>
 </section>
@@ -2541,22 +1275,22 @@ Possible values are:</p>
 >
     <h4 class="phpdocumentor-element__name" id="method_unshift">
         unshift()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_unshift" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h4>
     <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">664</span>
+    <span class="phpdocumentor-element-found-in__line">328</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.664" class="phpdocumentor-element-found-in__source" data-line="664" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.328" class="phpdocumentor-element-found-in__source" data-line="328" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Prepend the list with an item.</p>
 
     <code class="phpdocumentor-code phpdocumentor-signature ">
     <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">unshift</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+                    <span class="phpdocumentor-signature__name">unshift</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
 
     <div class="phpdocumentor-label-line">
             <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
@@ -2567,7 +1301,7 @@ Possible values are:</p>
     <dl class="phpdocumentor-argument-list">
                     <dt class="phpdocumentor-argument-list__entry">
                 <span class="phpdocumentor-signature__argument__name">$value</span>
-                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\AllowedType">AllowedType</abbr></span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
                             </dt>
             <dd class="phpdocumentor-argument-list__definition">
                     <section class="phpdocumentor-description"><p>The item to unshift</p>
@@ -2579,7 +1313,7 @@ Possible values are:</p>
     
     <h5 class="phpdocumentor-tag-list__heading" id="tags">
         Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_unshift#tags" class="headerlink"><i class="fas fa-link"></i></a>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift#tags" class="headerlink"><i class="fas fa-link"></i></a>
 
     </h5>
     <dl class="phpdocumentor-tag-list">
@@ -2587,7 +1321,7 @@ Possible values are:</p>
                     <span class="phpdocumentor-tag__name">throws</span>
                 </dt>
                 <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
                                                             
                                                  <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
 </section>
@@ -2611,9 +1345,9 @@ Possible values are:</p>
     <aside class="phpdocumentor-element-found-in">
     <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictStack.php"><a href="files/src-datastructures-strictstack.html"><abbr title="src/DataStructures/StrictStack.php">StrictStack.php</abbr></a></abbr>
     :
-    <span class="phpdocumentor-element-found-in__line">80</span>
+    <span class="phpdocumentor-element-found-in__line">76</span>
 
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.80" class="phpdocumentor-element-found-in__source" data-line="80" data-modal="source-view" data-src="files/src/DataStructures/StrictStack.php.txt"></a>
+            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.76" class="phpdocumentor-element-found-in__source" data-line="76" data-modal="source-view" data-src="files/src/DataStructures/StrictStack.php.txt"></a>
     </aside>
 
         <p class="phpdocumentor-summary">Unstack an item from the stack.</p>
@@ -2629,6 +1363,23 @@ Possible values are:</p>
     
     
     
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-StrictStack.html#method_unstack#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\RuntimeException">RuntimeException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if the list is empty</p>
+</section>
+
+                                    </dd>
+                                            </dl>
 
             <section>
         <h5 class="phpdocumentor-return-value__heading">Return values</h5>
@@ -2639,111 +1390,6 @@ Possible values are:</p>
 
             </section>
 
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -public
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_valid">
-        valid()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_valid" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">684</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.684" class="phpdocumentor-element-found-in__source" data-line="684" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Check if current cursor position is valid.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">public</span>
-                    <span class="phpdocumentor-signature__name">valid</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
-
-    <div class="phpdocumentor-label-line">
-            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
-
-        </div>
-    
-    
-    
-
-            <section>
-        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
-        <span class="phpdocumentor-signature__response_type">bool</span>
-                    &mdash;
-                <section class="phpdocumentor-description"><p>Whether the current cursor position is valid</p>
-</section>
-
-            </section>
-
-</article>
-                    <article
-        class="phpdocumentor-element
-            -method
-            -protected
-                                                        "
->
-    <h4 class="phpdocumentor-element__name" id="method_setAllowedTypes">
-        setAllowedTypes()
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h4>
-    <aside class="phpdocumentor-element-found-in">
-    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/StrictList.php"><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></abbr>
-    :
-    <span class="phpdocumentor-element-found-in__line">535</span>
-
-            <a href="classes/OCC-Basics-DataStructures-StrictStack.html#source-view.535" class="phpdocumentor-element-found-in__source" data-line="535" data-modal="source-view" data-src="files/src/DataStructures/StrictList.php.txt"></a>
-    </aside>
-
-        <p class="phpdocumentor-summary">Set allowed data types of list items.</p>
-
-    <code class="phpdocumentor-code phpdocumentor-signature ">
-    <span class="phpdocumentor-signature__visibility">protected</span>
-                    <span class="phpdocumentor-signature__name">setAllowedTypes</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;&nbsp;</span><span class="phpdocumentor-signature__argument__name">$allowedTypes</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">[]</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
-
-    <div class="phpdocumentor-label-line">
-        </div>
-    
-        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
-    <dl class="phpdocumentor-argument-list">
-                    <dt class="phpdocumentor-argument-list__entry">
-                <span class="phpdocumentor-signature__argument__name">$allowedTypes</span>
-                : <span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;</span>
-                 = <span class="phpdocumentor-signature__argument__default-value">[]</span>            </dt>
-            <dd class="phpdocumentor-argument-list__definition">
-                    <section class="phpdocumentor-description"><p>Allowed data types of items</p>
-</section>
-
-            </dd>
-            </dl>
-
-    
-    <h5 class="phpdocumentor-tag-list__heading" id="tags">
-        Tags
-        <a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes#tags" class="headerlink"><i class="fas fa-link"></i></a>
-
-    </h5>
-    <dl class="phpdocumentor-tag-list">
-                                    <dt class="phpdocumentor-tag-list__entry">
-                    <span class="phpdocumentor-tag__name">throws</span>
-                </dt>
-                <dd class="phpdocumentor-tag-list__definition">
-                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
-                                                            
-                                                 <section class="phpdocumentor-description"><p>if any value of <code class="prettyprint">$allowedTypes</code> is not a string</p>
-</section>
-
-                                    </dd>
-                                            </dl>
-
-    
 </article>
             </section>
 
@@ -2850,59 +1496,30 @@ Possible values are:</p>
             <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
             <li>
                 <ul class="phpdocumentor-list -clean">
-                                                            <li><a href="classes/OCC-Basics-DataStructures-StrictStack.html#toc-properties">Properties</a></li>
-                                                            <li><a href="classes/OCC-Basics-DataStructures-StrictStack.html#toc-methods">Methods</a></li>
+                                                                                <li><a href="classes/OCC-Basics-DataStructures-StrictStack.html#toc-methods">Methods</a></li>
                                     </ul>
             </li>
             
-                            <li class="phpdocumentor-on-this-page-section__title">Properties</li>
-                <li>
-                    <ul class="phpdocumentor-list -clean">
-                                                    <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#property_allowedTypes">$allowedTypes<a href="classes/OCC-Basics-DataStructures-StrictStack.html"></li>
-                                            </ul>
-                </li>
             
                         <li class="phpdocumentor-on-this-page-section__title">Methods</li>
             <li>
                 <ul class="phpdocumentor-list -clean">
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictStack.html#method___construct">__construct()</a></li>
-                                            <li><a href="classes/OCC-Basics-Traits-Getter.html#method___get">__get()</a></li>
-                                            <li><a href="classes/OCC-Basics-Traits-Getter.html#method___isset">__isset()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_add">add()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_append">append()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_bottom">bottom()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_clear">clear()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_count">count()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_current">current()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_get">get()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getAllowedTypes">getAllowedTypes()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_getIteratorMode">getIteratorMode()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isAllowedType">isAllowedType()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isEmpty">isEmpty()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_isList">isList()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_key">key()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_next">next()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetExists">offsetExists()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet">offsetGet()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet">offsetSet()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset">offsetUnset()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_pop">pop()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prepend">prepend()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_prev">prev()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_push">push()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_remove">remove()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_rewind">rewind()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_set">set()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictStack.html#method_setIteratorMode">setIteratorMode()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_shift">shift()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct">__construct()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add">add()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append">append()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear">clear()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get">get()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList">isList()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet">offsetSet()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend">prepend()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push">push()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove">remove()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set">set()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictStack.html#method_stack">stack()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toArray">toArray()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_top">top()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_toStrictCollection">toStrictCollection()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_unshift">unshift()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray">toArray()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection">toStrictCollection()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift">unshift()</a></li>
                                             <li><a href="classes/OCC-Basics-DataStructures-StrictStack.html#method_unstack">unstack()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_valid">valid()</a></li>
-                                            <li><a href="classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes">setAllowedTypes()</a></li>
                                     </ul>
             </li>
                     </ul>
diff --git a/doc/classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html b/doc/classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html
new file mode 100644
index 0000000..2cb70b0
--- /dev/null
+++ b/doc/classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html
@@ -0,0 +1,1391 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PHP Basics</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PHP Basics</a></h1>
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+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
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+                
+            </li>
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+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+            </ul>
+
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+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
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+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-basics.html" class="">Basics</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/Basics.html" class="">Basics</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="packages/Basics-DataStructures.html" class="">DataStructures</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-ErrorHandlers.html" class="">ErrorHandlers</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-Interfaces.html" class="">Interfaces</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-Traits.html" class="">Traits</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
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+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                <section>
+                                        <ul class="phpdocumentor-breadcrumbs">
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ.html">OCC</a></li>
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ-basics.html">Basics</a></li>
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ-basics-datastructures.html">DataStructures</a></li>
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ-basics-datastructures-traits.html">Traits</a></li>
+    </ul>
+
+    <article class="phpdocumentor-element -trait">
+        <h2 class="phpdocumentor-content__title">
+    StrictSplDatastructureTrait
+    </h2>
+
+        <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">50</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.50" class="phpdocumentor-element-found-in__source" data-line="50" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+            <p class="phpdocumentor-summary">The common interface of all type-sensitive, SPL-based datastructures.</p>
+
+    <section class="phpdocumentor-description"><p>This extends all methods of the common interface of the Standard PHP Library
+<a href="https://www.php.net/spl.datastructures">Doubly Linked List Datastructures</a>
+by type-checking to only allow specified data types on the list.</p>
+</section>
+
+
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">author</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                                
+                                                 <section class="phpdocumentor-description"><p>Sebastian Meyer <a href="mailto:sebastian.meyer@opencultureconsulting.com">sebastian.meyer@opencultureconsulting.com</a></p>
+</section>
+
+                                    </dd>
+                                                <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">template</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                                
+                                                 <section class="phpdocumentor-description"><p>AllowedType of mixed</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+
+
+<h3 id="toc">
+    Table of Contents
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+
+
+
+
+
+
+<h4 id="toc-methods">
+    Methods
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#toc-methods" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h4>
+<dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct">__construct()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Create a type-sensitive, traversable list of items.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add">add()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Add/insert a new item at the specified offset.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append">append()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Append items at the end of the list.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear">clear()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Clear the list of any items.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get">get()</a>
+    <span>
+                                &nbsp;: <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>    </span>
+</dt>
+<dd>Get the item at the specified index.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList">isList()</a>
+    <span>
+                                &nbsp;: true    </span>
+</dt>
+<dd>Check if this can be considered a list.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet">offsetSet()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Set the item at the specified offset.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend">prepend()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Prepend items at the start of the list.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push">push()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Push an item at the end of the list.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove">remove()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Remove an item from the list.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set">set()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Set an item at the specified index.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray">toArray()</a>
+    <span>
+                                &nbsp;: array&lt;int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;    </span>
+</dt>
+<dd>Return array representation of list.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection">toStrictCollection()</a>
+    <span>
+                                &nbsp;: <a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;    </span>
+</dt>
+<dd>Turn list into a type-sensitive collection.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift">unshift()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Prepend the list with an item.</dd>
+
+    </dl>
+
+
+
+
+        
+
+        
+
+            <section class="phpdocumentor-methods">
+        <h3 class="phpdocumentor-elements__header" id="methods">
+            Methods
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#methods" class="headerlink"><i class="fas fa-link"></i></a>
+
+        </h3>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method___construct">
+        __construct()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">366</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.366" class="phpdocumentor-element-found-in__source" data-line="366" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Create a type-sensitive, traversable list of items.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">__construct</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;&nbsp;</span><span class="phpdocumentor-signature__argument__name">$allowedTypes</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">[]</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$allowedTypes</span>
+                : <span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;</span>
+                 = <span class="phpdocumentor-signature__argument__default-value">[]</span>            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>Allowed data types of items (optional)</p>
+<p>If empty, all types are allowed.
+Possible values are:</p>
+<ul>
+<li>&quot;array&quot;</li>
+<li>&quot;bool&quot;</li>
+<li>&quot;callable&quot;</li>
+<li>&quot;countable&quot;</li>
+<li>&quot;float&quot; or &quot;double&quot;</li>
+<li>&quot;int&quot; or &quot;integer&quot; or &quot;long&quot;</li>
+<li>&quot;iterable&quot;</li>
+<li>&quot;null&quot;</li>
+<li>&quot;numeric&quot;</li>
+<li>&quot;object&quot; or FQCN</li>
+<li>&quot;resource&quot;</li>
+<li>&quot;scalar&quot;</li>
+<li>&quot;string&quot;</li>
+</ul>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if any value of <code class="prettyprint">$allowedTypes</code> is not a string</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_add">
+        add()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">69</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.69" class="phpdocumentor-element-found-in__source" data-line="69" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Add/insert a new item at the specified offset.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">add</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$offset</span>
+                : <span class="phpdocumentor-signature__argument__return-type">int</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The offset where the new item is to be inserted</p>
+</section>
+
+            </dd>
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$value</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The new item for the offset</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                            <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_append">
+        append()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">85</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.85" class="phpdocumentor-element-found-in__source" data-line="85" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Append items at the end of the list.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">append</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$values</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>One or more items to append</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if any <code class="prettyprint">$values</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_clear">
+        clear()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">111</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.111" class="phpdocumentor-element-found-in__source" data-line="111" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Clear the list of any items.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">clear</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+    
+    
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_get">
+        get()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">130</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.130" class="phpdocumentor-element-found-in__source" data-line="130" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Get the item at the specified index.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">get</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$offset</span>
+                : <span class="phpdocumentor-signature__argument__return-type">int</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The item's index</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>The item</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_isList">
+        isList()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">142</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.142" class="phpdocumentor-element-found-in__source" data-line="142" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Check if this can be considered a list.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">isList</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">true</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+    
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type">true</span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>Always TRUE (this exists only for compatibility reasons)</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_offsetSet">
+        offsetSet()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">160</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.160" class="phpdocumentor-element-found-in__source" data-line="160" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Set the item at the specified offset.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">offsetSet</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int|null&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$offset</span>
+                : <span class="phpdocumentor-signature__argument__return-type">int|null</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The offset being set or NULL to append</p>
+</section>
+
+            </dd>
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$value</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The new item for the offset</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                            <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_prepend">
+        prepend()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">185</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.185" class="phpdocumentor-element-found-in__source" data-line="185" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Prepend items at the start of the list.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">prepend</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__variadic-operator">...</span><span class="phpdocumentor-signature__argument__name">$values</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$values</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>One or more items to prepend</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_push">
+        push()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">215</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.215" class="phpdocumentor-element-found-in__source" data-line="215" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Push an item at the end of the list.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">push</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$value</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The item to push</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_remove">
+        remove()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">239</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.239" class="phpdocumentor-element-found-in__source" data-line="239" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Remove an item from the list.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">remove</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$offset</span>
+                : <span class="phpdocumentor-signature__argument__return-type">int</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The item's index</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\OutOfRangeException">OutOfRangeException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>when <code class="prettyprint">$offset</code> is out of bounds</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_set">
+        set()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">268</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.268" class="phpdocumentor-element-found-in__source" data-line="268" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Set an item at the specified index.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">set</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$offset</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$offset</span>
+                : <span class="phpdocumentor-signature__argument__return-type">int</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The item's index</p>
+</section>
+
+            </dd>
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$value</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The item</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_toArray">
+        toArray()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">280</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.280" class="phpdocumentor-element-found-in__source" data-line="280" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Return array representation of list.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">toArray</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">array&lt;int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+    
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type">array&lt;int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>Array of list items</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_toStrictCollection">
+        toStrictCollection()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">292</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.292" class="phpdocumentor-element-found-in__source" data-line="292" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Turn list into a type-sensitive collection.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">toStrictCollection</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+    
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a>&lt;string|int, <abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&gt;</span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>A type-sensitive collection of the list's items</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_unshift">
+        unshift()
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/DataStructures/Traits/StrictSplDatastructureTrait.php"><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">328</span>
+
+            <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#source-view.328" class="phpdocumentor-element-found-in__source" data-line="328" data-modal="source-view" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Prepend the list with an item.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">unshift</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$value</span>
+                : <span class="phpdocumentor-signature__argument__return-type"><abbr title="\OCC\Basics\DataStructures\Traits\AllowedType">AllowedType</abbr></span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The item to unshift</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if <code class="prettyprint">$value</code> is not of allowed type</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+            </section>
+
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt" class="language-php line-numbers linkable-line-numbers"></pre>
+        </div>
+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
+    </div>
+</div>
+
+    <script type="text/javascript">
+        (function () {
+            function loadExternalCodeSnippet(el, url, line) {
+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
+                    const code = document.createElement('code');
+                    code.className = 'language-' + language;
+                    pre.textContent = '';
+                    pre.setAttribute('data-line', line)
+                    code.textContent = 'Loading…';
+                    pre.appendChild(code);
+
+                    var xhr = new XMLHttpRequest();
+
+                    xhr.open('GET', src, true);
+
+                    xhr.onreadystatechange = function () {
+                        if (xhr.readyState !== 4) {
+                            return;
+                        }
+
+                        if (xhr.status < 400 && xhr.responseText) {
+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
+                        }
+
+                        if (xhr.status >= 400) {
+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
+                        }
+
+                        code.textContent = '✖ Error: An unknown error occurred';
+                    };
+
+                    xhr.send(null);
+                });
+            }
+
+            const modalButtons = document.querySelectorAll("[data-modal]");
+            const openedAsLocalFile = window.location.protocol === 'file:';
+            if (modalButtons.length > 0 && openedAsLocalFile) {
+                console.warn(
+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
+                );
+            }
+
+            modalButtons.forEach(function (trigger) {
+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
+                }
+
+                trigger.addEventListener("click", function (event) {
+                    event.preventDefault();
+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
+                        return;
+                    }
+                    modal.classList.add("phpdocumentor-modal__open");
+
+                    loadExternalCodeSnippet(modal, trigger.dataset.src || null, trigger.dataset.line)
+                    const exits = modal.querySelectorAll("[data-exit-button]");
+                    exits.forEach(function (exit) {
+                        exit.addEventListener("click", function (event) {
+                            event.preventDefault();
+                            modal.classList.remove("phpdocumentor-modal__open");
+                        });
+                    });
+                });
+            });
+        })();
+    </script>
+
+    </article>
+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                                
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#toc-methods">Methods</a></li>
+                                    </ul>
+            </li>
+                                                <li class="phpdocumentor-on-this-page-section__title">Methods</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct">__construct()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add">add()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append">append()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear">clear()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get">get()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList">isList()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet">offsetSet()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend">prepend()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push">push()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove">remove()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set">set()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray">toArray()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection">toStrictCollection()</a></li>
+                                            <li><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift">unshift()</a></li>
+                                    </ul>
+            </li>
+                    </ul>
+    </section>
+
+                </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>
diff --git a/doc/classes/OCC-Basics-ErrorHandlers-ThrowErrorException.html b/doc/classes/OCC-Basics-ErrorHandlers-ThrowErrorException.html
index e4425cf..995dc97 100644
--- a/doc/classes/OCC-Basics-ErrorHandlers-ThrowErrorException.html
+++ b/doc/classes/OCC-Basics-ErrorHandlers-ThrowErrorException.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
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     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/classes/OCC-Basics-ErrorHandlers-TriggerExceptionError.html b/doc/classes/OCC-Basics-ErrorHandlers-TriggerExceptionError.html
index d6b9827..b4530c9 100644
--- a/doc/classes/OCC-Basics-ErrorHandlers-TriggerExceptionError.html
+++ b/doc/classes/OCC-Basics-ErrorHandlers-TriggerExceptionError.html
@@ -76,6 +76,24 @@
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+    <ul class="phpdocumentor-list">
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+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
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+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
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+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
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+            </ul>
 
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diff --git a/doc/classes/OCC-Basics-Interfaces-ArrayAccessTrait.html b/doc/classes/OCC-Basics-Interfaces-ArrayAccessTrait.html
index 8d893c7..dc73e22 100644
--- a/doc/classes/OCC-Basics-Interfaces-ArrayAccessTrait.html
+++ b/doc/classes/OCC-Basics-Interfaces-ArrayAccessTrait.html
@@ -76,6 +76,24 @@
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+    <ul class="phpdocumentor-list">
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+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
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+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
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+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
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     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/classes/OCC-Basics-Interfaces-CountableTrait.html b/doc/classes/OCC-Basics-Interfaces-CountableTrait.html
index e74e7d8..ea85a61 100644
--- a/doc/classes/OCC-Basics-Interfaces-CountableTrait.html
+++ b/doc/classes/OCC-Basics-Interfaces-CountableTrait.html
@@ -76,6 +76,24 @@
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     <a href="guides/overview/index.html#overview" class="">Overview</a>
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+    <ul class="phpdocumentor-list">
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+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
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+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
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+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
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diff --git a/doc/classes/OCC-Basics-Interfaces-IteratorAggregateTrait.html b/doc/classes/OCC-Basics-Interfaces-IteratorAggregateTrait.html
index 67cbba8..8827683 100644
--- a/doc/classes/OCC-Basics-Interfaces-IteratorAggregateTrait.html
+++ b/doc/classes/OCC-Basics-Interfaces-IteratorAggregateTrait.html
@@ -76,6 +76,24 @@
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+    <ul class="phpdocumentor-list">
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+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
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+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
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     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/classes/OCC-Basics-Interfaces-IteratorTrait.html b/doc/classes/OCC-Basics-Interfaces-IteratorTrait.html
index af7105a..b0ede7b 100644
--- a/doc/classes/OCC-Basics-Interfaces-IteratorTrait.html
+++ b/doc/classes/OCC-Basics-Interfaces-IteratorTrait.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
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     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/classes/OCC-Basics-Traits-Getter.html b/doc/classes/OCC-Basics-Traits-Getter.html
index 695d39a..45d28e8 100644
--- a/doc/classes/OCC-Basics-Traits-Getter.html
+++ b/doc/classes/OCC-Basics-Traits-Getter.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/classes/OCC-Basics-Traits-OverloadingGetter.html b/doc/classes/OCC-Basics-Traits-OverloadingGetter.html
index 09fa1e8..c9b2c8a 100644
--- a/doc/classes/OCC-Basics-Traits-OverloadingGetter.html
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@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
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+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
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diff --git a/doc/classes/OCC-Basics-Traits-OverloadingSetter.html b/doc/classes/OCC-Basics-Traits-OverloadingSetter.html
index ea9d3d2..6093885 100644
--- a/doc/classes/OCC-Basics-Traits-OverloadingSetter.html
+++ b/doc/classes/OCC-Basics-Traits-OverloadingSetter.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
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+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
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     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/classes/OCC-Basics-Traits-Setter.html b/doc/classes/OCC-Basics-Traits-Setter.html
index d804505..802bd73 100644
--- a/doc/classes/OCC-Basics-Traits-Setter.html
+++ b/doc/classes/OCC-Basics-Traits-Setter.html
@@ -76,6 +76,24 @@
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     <a href="guides/overview/index.html#overview" class="">Overview</a>
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+    <ul class="phpdocumentor-list">
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+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
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+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
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+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
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+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
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diff --git a/doc/classes/OCC-Basics-Traits-Singleton.html b/doc/classes/OCC-Basics-Traits-Singleton.html
index 80c4648..de4e78b 100644
--- a/doc/classes/OCC-Basics-Traits-Singleton.html
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@@ -76,6 +76,24 @@
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     <a href="guides/overview/index.html#overview" class="">Overview</a>
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+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
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new file mode 100644
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@@ -0,0 +1,644 @@
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+                
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+                
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+                <a href="packages/Basics-Traits.html" class="">Traits</a>
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+
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+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
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+
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+                                        <ul class="phpdocumentor-breadcrumbs">
+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ.html">OCC</a></li>
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+            <li class="phpdocumentor-breadcrumb"><a href="namespaces/occ-basics-traits.html">Traits</a></li>
+    </ul>
+
+    <article class="phpdocumentor-element -trait">
+        <h2 class="phpdocumentor-content__title">
+    TypeChecker
+    </h2>
+
+        <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/TypeChecker.php"><a href="files/src-traits-typechecker.html"><abbr title="src/Traits/TypeChecker.php">TypeChecker.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">65</span>
+
+            <a href="classes/OCC-Basics-Traits-TypeChecker.html#source-view.65" class="phpdocumentor-element-found-in__source" data-line="65" data-modal="source-view" data-src="files/src/Traits/TypeChecker.php.txt"></a>
+    </aside>
+
+            <p class="phpdocumentor-summary">A generic data type checker.</p>
+
+    <section class="phpdocumentor-description"><p>This allows to set a list of allowed atomic data types and fully qualified
+class names. It also provides a method to check if a value's data type
+matches at least one of these types.</p>
+</section>
+
+
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-Traits-TypeChecker.html#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">author</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                                
+                                                 <section class="phpdocumentor-description"><p>Sebastian Meyer <a href="mailto:sebastian.meyer@opencultureconsulting.com">sebastian.meyer@opencultureconsulting.com</a></p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+
+
+<h3 id="toc">
+    Table of Contents
+    <a href="classes/OCC-Basics-Traits-TypeChecker.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+
+
+
+
+
+
+<h4 id="toc-methods">
+    Methods
+    <a href="classes/OCC-Basics-Traits-TypeChecker.html#toc-methods" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h4>
+<dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_getAllowedTypes">getAllowedTypes()</a>
+    <span>
+                                &nbsp;: array&lt;string|int, string&gt;    </span>
+</dt>
+<dd>Get allowed data types.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_hasAllowedType">hasAllowedType()</a>
+    <span>
+                                &nbsp;: bool    </span>
+</dt>
+<dd>Check if a value&#039;s data type is allowed.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_isAllowedType">isAllowedType()</a>
+    <span>
+                                &nbsp;: bool    </span>
+</dt>
+<dd>Check if a data type is allowed.</dd>
+
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_setAllowedTypes">setAllowedTypes()</a>
+    <span>
+                                &nbsp;: void    </span>
+</dt>
+<dd>Set allowed data types.</dd>
+
+    </dl>
+
+
+
+
+        
+
+        
+
+            <section class="phpdocumentor-methods">
+        <h3 class="phpdocumentor-elements__header" id="methods">
+            Methods
+            <a href="classes/OCC-Basics-Traits-TypeChecker.html#methods" class="headerlink"><i class="fas fa-link"></i></a>
+
+        </h3>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_getAllowedTypes">
+        getAllowedTypes()
+        <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_getAllowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/TypeChecker.php"><a href="files/src-traits-typechecker.html"><abbr title="src/Traits/TypeChecker.php">TypeChecker.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">83</span>
+
+            <a href="classes/OCC-Basics-Traits-TypeChecker.html#source-view.83" class="phpdocumentor-element-found-in__source" data-line="83" data-modal="source-view" data-src="files/src/Traits/TypeChecker.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Get allowed data types.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">getAllowedTypes</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">array&lt;string|int, string&gt;</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+    
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type">array&lt;string|int, string&gt;</span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>The list of allowed data types</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_hasAllowedType">
+        hasAllowedType()
+        <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_hasAllowedType" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/TypeChecker.php"><a href="files/src-traits-typechecker.html"><abbr title="src/Traits/TypeChecker.php">TypeChecker.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">97</span>
+
+            <a href="classes/OCC-Basics-Traits-TypeChecker.html#source-view.97" class="phpdocumentor-element-found-in__source" data-line="97" data-modal="source-view" data-src="files/src/Traits/TypeChecker.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Check if a value&#039;s data type is allowed.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">hasAllowedType</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">mixed&nbsp;</span><span class="phpdocumentor-signature__argument__name">$value</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$value</span>
+                : <span class="phpdocumentor-signature__argument__return-type">mixed</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The value to check</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type">bool</span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>Whether the value's data type is allowed</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_isAllowedType">
+        isAllowedType()
+        <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_isAllowedType" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/TypeChecker.php"><a href="files/src-traits-typechecker.html"><abbr title="src/Traits/TypeChecker.php">TypeChecker.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">125</span>
+
+            <a href="classes/OCC-Basics-Traits-TypeChecker.html#source-view.125" class="phpdocumentor-element-found-in__source" data-line="125" data-modal="source-view" data-src="files/src/Traits/TypeChecker.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Check if a data type is allowed.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">isAllowedType</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">string&nbsp;</span><span class="phpdocumentor-signature__argument__name">$type</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">bool</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$type</span>
+                : <span class="phpdocumentor-signature__argument__return-type">string</span>
+                            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>The type to check</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+
+            <section>
+        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
+        <span class="phpdocumentor-signature__response_type">bool</span>
+                    &mdash;
+                <section class="phpdocumentor-description"><p>Whether the data type is allowed</p>
+</section>
+
+            </section>
+
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_setAllowedTypes">
+        setAllowedTypes()
+        <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_setAllowedTypes" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/Traits/TypeChecker.php"><a href="files/src-traits-typechecker.html"><abbr title="src/Traits/TypeChecker.php">TypeChecker.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">141</span>
+
+            <a href="classes/OCC-Basics-Traits-TypeChecker.html#source-view.141" class="phpdocumentor-element-found-in__source" data-line="141" data-modal="source-view" data-src="files/src/Traits/TypeChecker.php.txt"></a>
+    </aside>
+
+        <p class="phpdocumentor-summary">Set allowed data types.</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">setAllowedTypes</span><span>(</span><span class="phpdocumentor-signature__argument"><span>[</span><span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;&nbsp;</span><span class="phpdocumentor-signature__argument__name">$allowedTypes</span><span> = </span><span class="phpdocumentor-signature__argument__default-value">[]</span><span> ]</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
+
+    <div class="phpdocumentor-label-line">
+            <div class="phpdocumentor-label phpdocumentor-label--success"><span>API</span><span>Yes</span></div>
+
+        </div>
+    
+        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
+    <dl class="phpdocumentor-argument-list">
+                    <dt class="phpdocumentor-argument-list__entry">
+                <span class="phpdocumentor-signature__argument__name">$allowedTypes</span>
+                : <span class="phpdocumentor-signature__argument__return-type">array&lt;string|int, string&gt;</span>
+                 = <span class="phpdocumentor-signature__argument__default-value">[]</span>            </dt>
+            <dd class="phpdocumentor-argument-list__definition">
+                    <section class="phpdocumentor-description"><p>Allowed data types</p>
+</section>
+
+            </dd>
+            </dl>
+
+    
+    <h5 class="phpdocumentor-tag-list__heading" id="tags">
+        Tags
+        <a href="classes/OCC-Basics-Traits-TypeChecker.html#method_setAllowedTypes#tags" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h5>
+    <dl class="phpdocumentor-tag-list">
+                                    <dt class="phpdocumentor-tag-list__entry">
+                    <span class="phpdocumentor-tag__name">throws</span>
+                </dt>
+                <dd class="phpdocumentor-tag-list__definition">
+                                                                <span class="phpdocumentor-tag-link"><abbr title="\InvalidArgumentException">InvalidArgumentException</abbr></span>
+                                                            
+                                                 <section class="phpdocumentor-description"><p>if any value of <code class="prettyprint">$allowedTypes</code> is not a string</p>
+</section>
+
+                                    </dd>
+                                            </dl>
+
+    
+</article>
+            </section>
+
+        <div class="phpdocumentor-modal" id="source-view">
+    <div class="phpdocumentor-modal-bg" data-exit-button></div>
+    <div class="phpdocumentor-modal-container">
+        <div class="phpdocumentor-modal-content">
+            <pre style="max-height: 500px; overflow-y: scroll" data-src="files/src/Traits/TypeChecker.php.txt" class="language-php line-numbers linkable-line-numbers"></pre>
+        </div>
+        <button data-exit-button class="phpdocumentor-modal__close">&times;</button>
+    </div>
+</div>
+
+    <script type="text/javascript">
+        (function () {
+            function loadExternalCodeSnippet(el, url, line) {
+                Array.prototype.slice.call(el.querySelectorAll('pre[data-src]')).forEach((pre) => {
+                    const src = url || pre.getAttribute('data-src').replace(/\\/g, '/');
+                    const language = 'php';
+
+                    const code = document.createElement('code');
+                    code.className = 'language-' + language;
+                    pre.textContent = '';
+                    pre.setAttribute('data-line', line)
+                    code.textContent = 'Loading…';
+                    pre.appendChild(code);
+
+                    var xhr = new XMLHttpRequest();
+
+                    xhr.open('GET', src, true);
+
+                    xhr.onreadystatechange = function () {
+                        if (xhr.readyState !== 4) {
+                            return;
+                        }
+
+                        if (xhr.status < 400 && xhr.responseText) {
+                            code.textContent = xhr.responseText;
+                            Prism.highlightElement(code);
+                            return;
+                        }
+
+                        if (xhr.status === 404) {
+                            code.textContent = '✖ Error: File could not be found';
+                            return;
+                        }
+
+                        if (xhr.status >= 400) {
+                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
+                            return;
+                        }
+
+                        code.textContent = '✖ Error: An unknown error occurred';
+                    };
+
+                    xhr.send(null);
+                });
+            }
+
+            const modalButtons = document.querySelectorAll("[data-modal]");
+            const openedAsLocalFile = window.location.protocol === 'file:';
+            if (modalButtons.length > 0 && openedAsLocalFile) {
+                console.warn(
+                    'Viewing the source code is unavailable because you are opening this page from the file:// scheme; ' +
+                    'browsers block XHR requests when a page is opened this way'
+                );
+            }
+
+            modalButtons.forEach(function (trigger) {
+                if (openedAsLocalFile) {
+                    trigger.setAttribute("hidden", "hidden");
+                }
+
+                trigger.addEventListener("click", function (event) {
+                    event.preventDefault();
+                    const modal = document.getElementById(trigger.dataset.modal);
+                    if (!modal) {
+                        console.error(`Modal with id "${trigger.dataset.modal}" could not be found`);
+                        return;
+                    }
+                    modal.classList.add("phpdocumentor-modal__open");
+
+                    loadExternalCodeSnippet(modal, trigger.dataset.src || null, trigger.dataset.line)
+                    const exits = modal.querySelectorAll("[data-exit-button]");
+                    exits.forEach(function (exit) {
+                        exit.addEventListener("click", function (event) {
+                            event.preventDefault();
+                            modal.classList.remove("phpdocumentor-modal__open");
+                        });
+                    });
+                });
+            });
+        })();
+    </script>
+
+    </article>
+                                </section>
+                <section class="phpdocumentor-on-this-page__sidebar">
+                                
+    <section class="phpdocumentor-on-this-page__content">
+        <strong class="phpdocumentor-on-this-page__title">On this page</strong>
+
+        <ul class="phpdocumentor-list -clean">
+            <li class="phpdocumentor-on-this-page-section__title">Table Of Contents</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                <li><a href="classes/OCC-Basics-Traits-TypeChecker.html#toc-methods">Methods</a></li>
+                                    </ul>
+            </li>
+                                                <li class="phpdocumentor-on-this-page-section__title">Methods</li>
+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                            <li><a href="classes/OCC-Basics-Traits-TypeChecker.html#method_getAllowedTypes">getAllowedTypes()</a></li>
+                                            <li><a href="classes/OCC-Basics-Traits-TypeChecker.html#method_hasAllowedType">hasAllowedType()</a></li>
+                                            <li><a href="classes/OCC-Basics-Traits-TypeChecker.html#method_isAllowedType">isAllowedType()</a></li>
+                                            <li><a href="classes/OCC-Basics-Traits-TypeChecker.html#method_setAllowedTypes">setAllowedTypes()</a></li>
+                                    </ul>
+            </li>
+                    </ul>
+    </section>
+
+                </section>
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="classes/OCC-Basics-Traits-TypeChecker.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>
diff --git a/doc/css/template.css b/doc/css/template.css
index 6dd70bf..82f2424 100644
--- a/doc/css/template.css
+++ b/doc/css/template.css
@@ -311,6 +311,8 @@ aside.phpdocumentor-sidebar
     padding: 0 var(--spacing-md) !important;
 }
 
+p > code,
+li > code,
 code.prettyprint
 {
     background-color: var(--code-background-color);
@@ -321,6 +323,38 @@ code.prettyprint
     padding: var(--spacing-xxxs);
 }
 
+@media (max-width: 999px) {
+div.admonition-wrapper
+{
+    display: none;
+}
+}
+
+@media (min-width: 1000px) {
+div.admonition-wrapper
+{
+    display: block;
+    float: right;
+    padding: var(--spacing-md);
+    margin: 0 0 var(--spacing-md) var(--spacing-md);
+    width: auto;
+    font-size: var(--text-sm);
+    border: 1px solid var(--primary-color-lighten);
+}
+}
+
+div.admonition-wrapper
+    p.sidebar-title
+{
+    font-weight: bold;
+}
+
+div.contents
+    ul.phpdocumentor-list
+{
+    margin-bottom: 0;
+}
+
 div.phpdocumentor-content
     div.section
         ul
diff --git a/doc/files/src-datastructures-exceptions-invaliddatatypeexception.html b/doc/files/src-datastructures-exceptions-invaliddatatypeexception.html
new file mode 100644
index 0000000..f468577
--- /dev/null
+++ b/doc/files/src-datastructures-exceptions-invaliddatatypeexception.html
@@ -0,0 +1,362 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PHP Basics</title>
+    
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PHP Basics</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
+    
+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
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+        <h2 class="phpdocumentor-content__title">StrictSplDatastructureTrait.php</h2>
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+    <section class="phpdocumentor-description"><p>Copyright (C) 2024 Sebastian Meyer <a href="mailto:sebastian.meyer@opencultureconsulting.com">sebastian.meyer@opencultureconsulting.com</a></p>
+<p>This program is free software: you can redistribute it and/or modify
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+along with this program. If not, see <a href="http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>.</p>
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+    <h4 id="toc-traits">
+        Traits
+        <a href="files/src-datastructures-strictspldatastructuretrait.html#toc-traits" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-DataStructures-StrictSplDatastructureTrait.html"><abbr title="\OCC\Basics\DataStructures\StrictSplDatastructureTrait">StrictSplDatastructureTrait</abbr></a></dt><dd>The common interface of all type-sensitive, SPL-based datastructures.</dd>    </dl>
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+    <section class="phpdocumentor-description"><p>Copyright (C) 2024 Sebastian Meyer <a href="mailto:sebastian.meyer@opencultureconsulting.com">sebastian.meyer@opencultureconsulting.com</a></p>
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+            <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html"><abbr title="\OCC\Basics\DataStructures\Traits\StrictSplDatastructureTrait">StrictSplDatastructureTrait</abbr></a></dt><dd>The common interface of all type-sensitive, SPL-based datastructures.</dd>    </dl>
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@@ -76,6 +76,24 @@
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+        <h2 class="phpdocumentor-content__title">TypeChecker.php</h2>
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+
+    <section class="phpdocumentor-description"><p>Copyright (C) 2024 Sebastian Meyer <a href="mailto:sebastian.meyer@opencultureconsulting.com">sebastian.meyer@opencultureconsulting.com</a></p>
+<p>This program is free software: you can redistribute it and/or modify
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+<h3 id="toc">
+    Table of Contents
+    <a href="files/src-traits-typechecker.html#toc" class="headerlink"><i class="fas fa-link"></i></a>
+
+</h3>
+
+
+
+
+
+    <h4 id="toc-traits">
+        Traits
+        <a href="files/src-traits-typechecker.html#toc-traits" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-TypeChecker.html"><abbr title="\OCC\Basics\Traits\TypeChecker">TypeChecker</abbr></a></dt><dd>A generic data type checker.</dd>    </dl>
+
+
+
+
+
+
+
+
+
+        
+
+        
+        <div class="phpdocumentor-modal" id="source-view">
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+            <pre style="max-height: 500px; overflow-y: scroll" data-src="files/src/Traits/TypeChecker.php.txt" class="language-php line-numbers linkable-line-numbers"></pre>
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+            <li>
+                <ul class="phpdocumentor-list -clean">
+                                                                                                                            <li><a href="files/src-traits-typechecker.html#toc-traits">Traits</a></li>
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diff --git a/doc/files/src/DataStructures/Exceptions/InvalidDataTypeException.php.txt b/doc/files/src/DataStructures/Exceptions/InvalidDataTypeException.php.txt
new file mode 100644
index 0000000..784d43e
--- /dev/null
+++ b/doc/files/src/DataStructures/Exceptions/InvalidDataTypeException.php.txt
@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * PHP Basics
+ *
+ * Copyright (C) 2024 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace OCC\Basics\DataStructures\Exceptions;
+
+use DomainException;
+
+/**
+ * Common exception for type-sensitive datastructures.
+ *
+ * Exception thrown if a value does not adhere to the defined list of valid
+ * data types.
+ *
+ * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ * @package Basics\DataStructures
+ */
+class InvalidDataTypeException extends DomainException
+{
+}
diff --git a/doc/files/src/DataStructures/StrictCollection.php.txt b/doc/files/src/DataStructures/StrictCollection.php.txt
index d814faa..78f6883 100644
--- a/doc/files/src/DataStructures/StrictCollection.php.txt
+++ b/doc/files/src/DataStructures/StrictCollection.php.txt
@@ -27,35 +27,17 @@ use ArrayAccess;
 use Countable;
 use DomainException;
 use InvalidArgumentException;
+use OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException;
 use OCC\Basics\Interfaces\ArrayAccessTrait;
 use OCC\Basics\Interfaces\CountableTrait;
-use OCC\Basics\Traits\Getter;
+use OCC\Basics\Traits\TypeChecker;
+use OutOfRangeException;
 use Serializable;
 
 use function array_is_list;
-use function array_map;
-use function array_sum;
-use function count;
-use function function_exists;
 use function get_debug_type;
-use function is_a;
-use function is_array;
-use function is_bool;
-use function is_callable;
-use function is_countable;
-use function is_double;
-use function is_float;
-use function is_int;
 use function is_integer;
-use function is_iterable;
-use function is_long;
-use function is_null;
-use function is_numeric;
-use function is_resource;
-use function is_scalar;
 use function is_string;
-use function is_object;
-use function ltrim;
 use function serialize;
 use function sprintf;
 use function unserialize;
@@ -73,8 +55,6 @@ use function unserialize;
  * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
  * @package Basics\DataStructures
  *
- * @property-read string[] $allowedTypes The allowed data types for items.
- *
  * @api
  *
  * @template AllowedType of mixed
@@ -86,35 +66,28 @@ class StrictCollection implements ArrayAccess, Countable, Serializable
     use ArrayAccessTrait;
     /** @use CountableTrait<AllowedType> */
     use CountableTrait;
-    use Getter;
-
-    /**
-     * The allowed data types for collection items.
-     *
-     * @var string[]
-     *
-     * @internal
-     */
-    protected array $allowedTypes = [];
+    use TypeChecker {
+        setAllowedTypes as protected;
+    }
 
     /**
      * Holds the collection's items.
      *
-     * @var AllowedType[]
+     * @var array<array-key, AllowedType>
      *
      * @internal
      */
     protected array $_data = [];
 
     /**
-     * Add/insert a new item at the specified index.
+     * Add/insert a item at the specified index.
      *
-     * @param array-key $offset The new item's index
-     * @param AllowedType $value The new item
+     * @param array-key $offset The item's index
+     * @param AllowedType $value The item
      *
      * @return void
      *
-     * @throws InvalidArgumentException if `$offset` is not of allowed type
+     * @throws InvalidDataTypeException if `$value` is not of allowed type
      *
      * @api
      */
@@ -140,53 +113,25 @@ class StrictCollection implements ArrayAccess, Countable, Serializable
      *
      * @param array-key $offset The item's index
      *
-     * @return ?AllowedType The item or NULL if key is invalid
+     * @return AllowedType The item
+     *
+     * @throws OutOfRangeException when `$offset` is out of bounds
      *
      * @api
      */
     public function get(int|string $offset): mixed
     {
-        return $this->offsetGet($offset);
-    }
-
-    /**
-     * Get allowed data types for collection items.
-     *
-     * @return string[] The list of allowed data types
-     *
-     * @api
-     */
-    public function getAllowedTypes(): array
-    {
-        return $this->allowedTypes;
-    }
-
-    /**
-     * Check if the item's data type is allowed in the collection.
-     *
-     * @param AllowedType $value The item to check
-     *
-     * @return bool Whether the item's data type is allowed
-     *
-     * @api
-     */
-    public function isAllowedType(mixed $value): bool
-    {
-        if (count($this->allowedTypes) === 0) {
-            return true;
+        if (!$this->offsetExists($offset)) {
+            throw new OutOfRangeException(
+                sprintf(
+                    'Offset %s is not a valid index key for this collection.',
+                    $offset
+                )
+            );
         }
-        foreach ($this->allowedTypes as $type) {
-            $function = 'is_' . $type;
-            if (function_exists($function) && $function($value)) {
-                return true;
-            }
-            /** @var class-string $fqcn */
-            $fqcn = ltrim($type, '\\');
-            if (is_object($value) && is_a($value, $fqcn)) {
-                return true;
-            }
-        }
-        return false;
+        /** @var AllowedType $value */
+        $value = $this->offsetGet($offset);
+        return $value;
     }
 
     /**
@@ -226,7 +171,8 @@ class StrictCollection implements ArrayAccess, Countable, Serializable
      *
      * @return void
      *
-     * @throws InvalidArgumentException if `$offset` or `$value` is not of allowed type
+     * @throws InvalidDataTypeException if `$value` is not of allowed type
+     * @throws InvalidArgumentException if `$offset` is not a valid array key
      *
      * @api
      */
@@ -240,8 +186,8 @@ class StrictCollection implements ArrayAccess, Countable, Serializable
                 )
             );
         }
-        if (!$this->isAllowedType($value)) {
-            throw new InvalidArgumentException(
+        if (!$this->hasAllowedType($value)) {
+            throw new InvalidDataTypeException(
                 sprintf(
                     'Parameter 2 must be an allowed type, %s given.',
                     get_debug_type($value)
@@ -258,10 +204,20 @@ class StrictCollection implements ArrayAccess, Countable, Serializable
      *
      * @return void
      *
+     * @throws OutOfRangeException when `$offset` is out of bounds
+     *
      * @api
      */
     public function remove(int|string $offset): void
     {
+        if (!$this->offsetExists($offset)) {
+            throw new OutOfRangeException(
+                sprintf(
+                    'Offset %s is not a valid index key for this collection.',
+                    $offset
+                )
+            );
+        }
         $this->offsetUnset($offset);
     }
 
@@ -283,7 +239,7 @@ class StrictCollection implements ArrayAccess, Countable, Serializable
      *
      * @return void
      *
-     * @throws InvalidArgumentException if `$value` is not of allowed type
+     * @throws InvalidDataTypeException if `$value` is not of allowed type
      *
      * @api
      */
@@ -292,29 +248,10 @@ class StrictCollection implements ArrayAccess, Countable, Serializable
         $this->offsetSet($offset, $value);
     }
 
-    /**
-     * Set allowed data types of collection items.
-     *
-     * @param string[] $allowedTypes Allowed data types of items
-     *
-     * @return void
-     *
-     * @throws InvalidArgumentException if any value of `$allowedTypes` is not a string
-     */
-    protected function setAllowedTypes(array $allowedTypes = []): void
-    {
-        if (array_sum(array_map('is_string', $allowedTypes)) !== count($allowedTypes)) {
-            throw new InvalidArgumentException(
-                'Allowed types must be array of strings or empty array.'
-            );
-        }
-        $this->allowedTypes = $allowedTypes;
-    }
-
     /**
      * Return array representation of collection.
      *
-     * @return AllowedType[] Array of collection items
+     * @return array<array-key, AllowedType> Array of collection items
      *
      * @api
      */
@@ -338,12 +275,11 @@ class StrictCollection implements ArrayAccess, Countable, Serializable
     {
         if (!$this->isList()) {
             throw new DomainException(
-                'Cannot convert into list: collection contains non-integer and/or non-consecutive keys.'
+                'Cannot convert into StrictList: collection contains non-integer and/or non-consecutive keys.'
             );
         }
-        $strictList = new StrictList($this->allowedTypes);
-        $items = $this->toArray();
-        $strictList->append(...$items);
+        $strictList = new StrictList($this->getAllowedTypes());
+        $strictList->append(...$this->toArray());
         return $strictList;
     }
 
@@ -361,18 +297,6 @@ class StrictCollection implements ArrayAccess, Countable, Serializable
         $this->__unserialize($dataArray);
     }
 
-    /**
-     * Magic getter method for $this->allowedTypes.
-     *
-     * @return string[] The list of allowed data types
-     *
-     * @internal
-     */
-    protected function _magicGetAllowedTypes(): array
-    {
-        return $this->getAllowedTypes();
-    }
-
     /**
      * Create a type-sensitive collection of items.
      *
@@ -425,8 +349,8 @@ class StrictCollection implements ArrayAccess, Countable, Serializable
     public function __serialize(): array
     {
         return [
-            'StrictCollection::allowedTypes' => $this->allowedTypes,
-            'StrictCollection::items' => $this->_data
+            'StrictCollection::allowedTypes' => $this->getAllowedTypes(),
+            'StrictCollection::items' => $this->toArray()
         ];
     }
 
@@ -446,7 +370,7 @@ class StrictCollection implements ArrayAccess, Countable, Serializable
         /** @var string[] $allowedTypes */
         $allowedTypes = $data['StrictCollection::allowedTypes'];
         $this->setAllowedTypes($allowedTypes);
-        /** @var AllowedType[] $items */
+        /** @var array<array-key, AllowedType> $items */
         $items = $data['StrictCollection::items'];
         foreach ($items as $offset => $value) {
             $this->offsetSet($offset, $value);
diff --git a/doc/files/src/DataStructures/StrictList.php.txt b/doc/files/src/DataStructures/StrictList.php.txt
index db1ec77..be8f407 100644
--- a/doc/files/src/DataStructures/StrictList.php.txt
+++ b/doc/files/src/DataStructures/StrictList.php.txt
@@ -23,46 +23,8 @@ declare(strict_types=1);
 
 namespace OCC\Basics\DataStructures;
 
-use ArrayAccess;
-use Countable;
-use InvalidArgumentException;
-use Iterator;
-use OutOfRangeException;
-use RangeException;
-use RuntimeException;
+use OCC\Basics\DataStructures\Traits\StrictSplDatastructureTrait;
 use SplDoublyLinkedList;
-use OCC\Basics\Traits\Getter;
-use Serializable;
-
-use function array_map;
-use function array_sum;
-use function count;
-use function function_exists;
-use function get_debug_type;
-use function in_array;
-use function is_a;
-use function is_array;
-use function is_bool;
-use function is_callable;
-use function is_countable;
-use function is_double;
-use function is_float;
-use function is_int;
-use function is_integer;
-use function is_iterable;
-use function is_long;
-use function is_null;
-use function is_numeric;
-use function is_resource;
-use function is_scalar;
-use function is_string;
-use function is_object;
-use function iterator_to_array;
-use function ltrim;
-use function range;
-use function serialize;
-use function sprintf;
-use function unserialize;
 
 /**
  * A type-sensitive, taversable list.
@@ -74,709 +36,13 @@ use function unserialize;
  * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
  * @package Basics\DataStructures
  *
- * @property-read string[] $allowedTypes The allowed data types for values.
- *
  * @api
  *
  * @template AllowedType of mixed
  * @extends SplDoublyLinkedList<AllowedType>
- * @implements ArrayAccess<int, AllowedType>
- * @implements Iterator<AllowedType>
  */
-class StrictList extends SplDoublyLinkedList implements ArrayAccess, Countable, Iterator, Serializable
+class StrictList extends SplDoublyLinkedList
 {
-    use Getter;
-
-    /**
-     * The allowed data types for list items.
-     *
-     * @var string[]
-     *
-     * @internal
-     */
-    protected array $allowedTypes = [];
-
-    /**
-     * Add/insert a new item at the specified offset.
-     *
-     * @param int $offset The offset where the new item is to be inserted
-     * @param AllowedType $value The new item for the offset
-     *
-     * @return void
-     *
-     * @throws InvalidArgumentException if `$value` is not of allowed type
-     * @throws OutOfRangeException when `$offset` is out of bounds
-     *
-     * @api
-     */
-    public function add(int $offset, mixed $value): void
-    {
-        $this->offsetSet($offset, $value);
-    }
-
-    /**
-     * Append items at the end of the list.
-     *
-     * @param AllowedType ...$values One or more items to append
-     *
-     * @return void
-     *
-     * @throws InvalidArgumentException if any `$values` is not of allowed type
-     *
-     * @api
-     */
-    public function append(mixed ...$values): void
-    {
-        /** @var array<int, AllowedType> $values */
-        foreach ($values as $count => $value) {
-            if (!$this->isAllowedType($value)) {
-                throw new InvalidArgumentException(
-                    sprintf(
-                        'Parameter %d must be an allowed type, %s given.',
-                        $count + 1,
-                        get_debug_type($value)
-                    )
-                );
-            }
-        }
-        foreach ($values as $value) {
-            parent::push($value);
-        }
-    }
-
-    /**
-     * Peek at the item at the beginning of the list.
-     *
-     * @return AllowedType The first item of the list
-     *
-     * @throws RuntimeException if the list is empty
-     *
-     * @api
-     */
-    public function bottom(): mixed
-    {
-        return parent::bottom();
-    }
-
-    /**
-     * Clear the list of any items.
-     *
-     * @return void
-     *
-     * @api
-     */
-    public function clear(): void
-    {
-        while (!$this->isEmpty()) {
-            $this->pop();
-        }
-        $this->rewind();
-    }
-
-    /**
-     * Get the number of items on the list.
-     *
-     * @return int The number of items on the list
-     *
-     * @api
-     */
-    public function count(): int
-    {
-        return parent::count();
-    }
-
-    /**
-     * Get the current list item.
-     *
-     * @return AllowedType The current item
-     *
-     * @api
-     */
-    public function current(): mixed
-    {
-        return parent::current();
-    }
-
-    /**
-     * Get the item at the specified index.
-     *
-     * @param int $offset The item's index
-     *
-     * @return AllowedType The item
-     *
-     * @throws OutOfRangeException when `$offset` is out of bounds
-     *
-     * @api
-     */
-    public function get(int $offset): mixed
-    {
-        return $this->offsetGet($offset);
-    }
-
-    /**
-     * Get allowed data types for list items.
-     *
-     * @return string[] The list of allowed data types
-     *
-     * @api
-     */
-    public function getAllowedTypes(): array
-    {
-        return $this->allowedTypes;
-    }
-
-    /**
-     * Get the mode of iteration.
-     *
-     * @return int The set of flags and modes of iteration
-     *
-     * @api
-     */
-    public function getIteratorMode(): int
-    {
-        return parent::getIteratorMode();
-    }
-
-    /**
-     * Check if the item's data type is allowed on the list.
-     *
-     * @param AllowedType $value The item to check
-     *
-     * @return bool Whether the item's data type is allowed
-     *
-     * @api
-     */
-    public function isAllowedType(mixed $value): bool
-    {
-        if (count($this->allowedTypes) === 0) {
-            return true;
-        }
-        foreach ($this->allowedTypes as $type) {
-            $function = 'is_' . $type;
-            if (function_exists($function) && $function($value)) {
-                return true;
-            }
-            /** @var class-string $fqcn */
-            $fqcn = ltrim($type, '\\');
-            if (is_object($value) && is_a($value, $fqcn)) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    /**
-     * Check if list is empty.
-     *
-     * @return bool Whether the list contains no items
-     *
-     * @api
-     */
-    public function isEmpty(): bool
-    {
-        return parent::isEmpty();
-    }
-
-    /**
-     * Check if this can be considered a list.
-     *
-     * @return true Always TRUE (this exists only for compatibility reasons)
-     *
-     * @api
-     */
-    public function isList(): bool
-    {
-        return true;
-    }
-
-    /**
-     * Get the current list index.
-     *
-     * @return int The current list index
-     *
-     * @api
-     */
-    public function key(): int
-    {
-        return parent::key();
-    }
-
-    /**
-     * Move the cursor to the next list index.
-     *
-     * @return void
-     *
-     * @api
-     */
-    public function next(): void
-    {
-        parent::next();
-    }
-
-    /**
-     * Check if the specified index exists and is not empty.
-     *
-     * @param int $offset The index to check
-     *
-     * @return bool Whether the index exists and is not empty
-     *
-     * @api
-     */
-    public function offsetExists(mixed $offset): bool
-    {
-        return parent::offsetExists($offset);
-    }
-
-    /**
-     * Get the item from the specified index.
-     *
-     * @param int $offset The item's index
-     *
-     * @return AllowedType The item
-     *
-     * @throws OutOfRangeException when `$offset` is out of bounds
-     *
-     * @api
-     */
-    public function offsetGet(mixed $offset): mixed
-    {
-        return parent::offsetGet($offset);
-    }
-
-    /**
-     * Set the item at the specified offset.
-     *
-     * @param ?int $offset The offset being set or NULL to append
-     * @param AllowedType $value The new item for the offset
-     *
-     * @return void
-     *
-     * @throws InvalidArgumentException if `$value` is not of allowed type
-     * @throws OutOfRangeException when `$offset` is out of bounds
-     *
-     * @api
-     */
-    public function offsetSet(mixed $offset, mixed $value): void
-    {
-        if (!$this->isAllowedType($value)) {
-            throw new InvalidArgumentException(
-                sprintf(
-                    'Parameter 2 must be an allowed type, %s given.',
-                    get_debug_type($value)
-                )
-            );
-        }
-        /** @psalm-suppress PossiblyNullArgument */
-        parent::offsetSet($offset, $value);
-    }
-
-    /**
-     * Unset the item at the specified index.
-     *
-     * @param int $offset The item's index
-     *
-     * @return void
-     *
-     * @throws OutOfRangeException when `$offset` is out of bounds
-     *
-     * @api
-     */
-    public function offsetUnset(mixed $offset): void
-    {
-        parent::offsetUnset($offset);
-    }
-
-    /**
-     * Pops an item from the end of the list.
-     *
-     * @return AllowedType The item from the end of the list
-     *
-     * @throws RuntimeException if the list is empty
-     *
-     * @api
-     */
-    public function pop(): mixed
-    {
-        return parent::pop();
-    }
-
-    /**
-     * Prepend items at the start of the list.
-     *
-     * @param AllowedType ...$values One or more items to prepend
-     *
-     * @return void
-     *
-     * @throws InvalidArgumentException if `$value` is not of allowed type
-     *
-     * @api
-     */
-    public function prepend(mixed ...$values): void
-    {
-        /** @var array<int, AllowedType> $values */
-        foreach ($values as $count => $value) {
-            if (!$this->isAllowedType($value)) {
-                throw new InvalidArgumentException(
-                    sprintf(
-                        'Parameter %d must be an allowed type, %s given.',
-                        $count + 1,
-                        get_debug_type($value)
-                    )
-                );
-            }
-        }
-        foreach ($values as $value) {
-            parent::unshift($value);
-        }
-    }
-
-    /**
-     * Move the cursor to the previous list index.
-     *
-     * @return void
-     *
-     * @api
-     */
-    public function prev(): void
-    {
-        parent::prev();
-    }
-
-    /**
-     * Push an item at the end of the list.
-     *
-     * @param AllowedType $value The item to push
-     *
-     * @return void
-     *
-     * @throws InvalidArgumentException if `$value` is not of allowed type
-     *
-     * @api
-     */
-    public function push(mixed $value): void
-    {
-        if (!$this->isAllowedType($value)) {
-            throw new InvalidArgumentException(
-                sprintf(
-                    'Parameter 1 must be an allowed type, %s given.',
-                    get_debug_type($value)
-                )
-            );
-        }
-        parent::push($value);
-    }
-
-    /**
-     * Remove an item from the list.
-     *
-     * @param int $offset The item's index
-     *
-     * @return void
-     *
-     * @throws OutOfRangeException when `$offset` is out of bounds
-     *
-     * @api
-     */
-    public function remove(int $offset): void
-    {
-        $this->offsetUnset($offset);
-    }
-
-    /**
-     * Rewind the iterator's cursor.
-     *
-     * @return void
-     *
-     * @api
-     */
-    public function rewind(): void
-    {
-        parent::rewind();
-    }
-
-    /**
-     * Get string representation of $this.
-     *
-     * @return string The string representation
-     *
-     * @internal
-     */
-    public function serialize(): string
-    {
-        return serialize($this->__serialize());
-    }
-
-    /**
-     * Set an item at the specified index.
-     *
-     * @param int $offset The item's index
-     * @param AllowedType $value The item
-     *
-     * @return void
-     *
-     * @throws InvalidArgumentException if `$value` is not of allowed type
-     *
-     * @api
-     */
-    public function set(int $offset, mixed $value): void
-    {
-        $this->offsetSet($offset, $value);
-    }
-
-    /**
-     * Set allowed data types of list items.
-     *
-     * @param string[] $allowedTypes Allowed data types of items
-     *
-     * @return void
-     *
-     * @throws InvalidArgumentException if any value of `$allowedTypes` is not a string
-     */
-    protected function setAllowedTypes(array $allowedTypes = []): void
-    {
-        if (array_sum(array_map('is_string', $allowedTypes)) !== count($allowedTypes)) {
-            throw new InvalidArgumentException(
-                'Allowed types must be array of strings or empty array.'
-            );
-        }
-        $this->allowedTypes = $allowedTypes;
-    }
-
-    /**
-     * Set the mode of iteration.
-     *
-     * @param int $mode The new iterator mode (0, 1, 2 or 3)
-     *
-     *                  There are two orthogonal sets of modes that can be set.
-     *
-     *                  The direction of iteration (either one or the other):
-     *                  - StrictList::IT_MODE_FIFO (queue style)
-     *                  - StrictList::IT_MODE_LIFO (stack style)
-     *
-     *                  The behavior of the iterator (either one or the other):
-     *                  - StrictList::IT_MODE_DELETE (delete items)
-     *                  - StrictList::IT_MODE_KEEP (keep items)
-     *
-     *                  The default mode is: IT_MODE_FIFO | IT_MODE_KEEP
-     *
-     * @return int The set of flags and modes of iteration
-     *
-     * @throws RangeException if an invalid `$mode` is given
-     *
-     * @api
-     */
-    public function setIteratorMode(int $mode): int
-    {
-        if (!in_array($mode, range(0, 3), true)) {
-            throw new RangeException(
-                sprintf(
-                    'Iterator mode must be an integer in range [0..3], %d given.',
-                    $mode
-                )
-            );
-        }
-        return parent::setIteratorMode($mode);
-    }
-
-    /**
-     * Shift an item from the beginning of the list.
-     *
-     * @return AllowedType The first item of the list
-     *
-     * @throws RuntimeException if the list is empty
-     *
-     * @api
-     */
-    public function shift(): mixed
-    {
-        return parent::shift();
-    }
-
-    /**
-     * Return array representation of list.
-     *
-     * @return AllowedType[] Array of list items
-     *
-     * @api
-     */
-    public function toArray(): array
-    {
-        return iterator_to_array($this, true);
-    }
-
-    /**
-     * Turn list into a type-sensitive collection.
-     *
-     * @return StrictCollection<AllowedType> A type-sensitive collection of the list's items
-     *
-     * @api
-     */
-    public function toStrictCollection(): StrictCollection
-    {
-        $strictCollection = new StrictCollection($this->allowedTypes);
-        foreach ($this->toArray() as $offset => $value) {
-            $strictCollection[$offset] = $value;
-        }
-        return $strictCollection;
-    }
-
-    /**
-     * Peek at the item at the end of the list.
-     *
-     * @return AllowedType The last item of the list
-     *
-     * @throws RuntimeException if the list is empty
-     *
-     * @api
-     */
-    public function top(): mixed
-    {
-        return parent::top();
-    }
-
-    /**
-     * Restore $this from string representation.
-     *
-     * @param string $data The string representation
-     *
-     * @return void
-     *
-     * @internal
-     */
-    public function unserialize($data): void
-    {
-        /** @var mixed[] $dataArray */
-        $dataArray = unserialize($data);
-        $this->__unserialize($dataArray);
-    }
-
-    /**
-     * Prepend the list with an item.
-     *
-     * @param AllowedType $value The item to unshift
-     *
-     * @return void
-     *
-     * @throws InvalidArgumentException if `$value` is not of allowed type
-     *
-     * @api
-     */
-    public function unshift(mixed $value): void
-    {
-        if (!$this->isAllowedType($value)) {
-            throw new InvalidArgumentException(
-                sprintf(
-                    'Parameter 1 must be an allowed type, %s given.',
-                    get_debug_type($value)
-                )
-            );
-        }
-        parent::unshift($value);
-    }
-
-    /**
-     * Check if current cursor position is valid.
-     *
-     * @return bool Whether the current cursor position is valid
-     *
-     * @api
-     */
-    public function valid(): bool
-    {
-        return parent::valid();
-    }
-
-    /**
-     * Magic getter method for $this->allowedTypes.
-     *
-     * @return string[] The list of allowed data types
-     *
-     * @internal
-     */
-    protected function _magicGetAllowedTypes(): array
-    {
-        return $this->getAllowedTypes();
-    }
-
-    /**
-     * Create a type-sensitive, traversable list of items.
-     *
-     * @param string[] $allowedTypes Allowed data types of items (optional)
-     *
-     *                               If empty, all types are allowed.
-     *                               Possible values are:
-     *                               - "array"
-     *                               - "bool"
-     *                               - "callable"
-     *                               - "countable"
-     *                               - "float" or "double"
-     *                               - "int" or "integer" or "long"
-     *                               - "iterable"
-     *                               - "null"
-     *                               - "numeric"
-     *                               - "object" or FQCN
-     *                               - "resource"
-     *                               - "scalar"
-     *                               - "string"
-     *
-     * @return void
-     *
-     * @throws InvalidArgumentException if any value of `$allowedTypes` is not a string
-     */
-    public function __construct(array $allowedTypes = [])
-    {
-        $this->setAllowedTypes($allowedTypes);
-    }
-
-    /**
-     * Get debug information for $this.
-     *
-     * @return mixed[] The debug information
-     *
-     * @internal
-     */
-    public function __debugInfo(): array
-    {
-        return $this->__serialize();
-    }
-
-    /**
-     * Get array representation of $this.
-     *
-     * @return mixed[] The array representation
-     *
-     * @internal
-     */
-    public function __serialize(): array
-    {
-        return [
-            'StrictList::allowedTypes' => $this->allowedTypes,
-            'SplDoublyLinkedList::dllist' => iterator_to_array($this),
-            'SplDoublyLinkedList::flags' => $this->getIteratorMode()
-        ];
-    }
-
-    /**
-     * Restore $this from array representation.
-     *
-     * @param mixed[] $data The array representation
-     *
-     * @return void
-     *
-     * @internal
-     *
-     * @psalm-suppress MethodSignatureMismatch
-     */
-    public function __unserialize(array $data): void
-    {
-        /** @var string[] $allowedTypes */
-        $allowedTypes = $data['StrictList::allowedTypes'];
-        $this->setAllowedTypes($allowedTypes);
-        /** @var array<int, AllowedType> $values */
-        $values = $data['SplDoublyLinkedList::dllist'];
-        $this->append(...$values);
-        /** @var int $flags */
-        $flags = $data['SplDoublyLinkedList::flags'];
-        $this->setIteratorMode($flags);
-    }
+    /** @use StrictSplDatastructureTrait<AllowedType> */
+    use StrictSplDatastructureTrait;
 }
diff --git a/doc/files/src/DataStructures/StrictQueue.php.txt b/doc/files/src/DataStructures/StrictQueue.php.txt
index f132fd7..266fa7c 100644
--- a/doc/files/src/DataStructures/StrictQueue.php.txt
+++ b/doc/files/src/DataStructures/StrictQueue.php.txt
@@ -23,24 +23,16 @@ declare(strict_types=1);
 
 namespace OCC\Basics\DataStructures;
 
-use ArrayAccess;
-use Countable;
-use InvalidArgumentException;
-use Iterator;
-use RangeException;
-use RuntimeException;
-use Serializable;
-
-use function sprintf;
+use OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException;
+use OCC\Basics\DataStructures\Traits\StrictSplDatastructureTrait;
+use SplQueue;
 
 /**
  * A type-sensitive, taversable queue (FIFO).
  *
- * Extends [\SplDoublyLinkedList](https://www.php.net/spldoublylinkedlist) with
- * an option to restrict the allowed data types for list items by providing the
- * constructor with an array of atomic types or fully qualified class names. It
- * also restricts the iterator direction to first-in, first-out (FIFO) exactly
- * like [\SplQueue](https://www.php.net/splqueue).
+ * Extends [\SplQueue](https://www.php.net/splqueue) with an option to restrict
+ * the allowed data types for list items by providing the constructor with an
+ * array of atomic types or fully qualified class names.
  *
  * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
  * @package Basics\DataStructures
@@ -48,23 +40,12 @@ use function sprintf;
  * @api
  *
  * @template AllowedType of mixed
- * @extends StrictList<AllowedType>
- * @implements ArrayAccess<int, AllowedType>
- * @implements Iterator<AllowedType>
+ * @extends SplQueue<AllowedType>
  */
-class StrictQueue extends StrictList implements ArrayAccess, Countable, Iterator, Serializable
+class StrictQueue extends SplQueue
 {
-    /**
-     * Dequeue an item from the queue.
-     *
-     * @return AllowedType The dequeued item
-     *
-     * @api
-     */
-    public function dequeue(): mixed
-    {
-        return parent::shift();
-    }
+    /** @use StrictSplDatastructureTrait<AllowedType> */
+    use StrictSplDatastructureTrait;
 
     /**
      * Add an item to the queue.
@@ -73,79 +54,12 @@ class StrictQueue extends StrictList implements ArrayAccess, Countable, Iterator
      *
      * @return void
      *
-     * @throws InvalidArgumentException if `$value` is not of allowed type
+     * @throws InvalidDataTypeException if `$value` is not of allowed type
      *
      * @api
      */
     public function enqueue(mixed $value): void
     {
-        parent::push($value);
-    }
-
-    /**
-     * Set the mode of iteration.
-     *
-     * @param int $mode The new iterator mode (0 or 1)
-     *
-     *                  There are two orthogonal sets of modes that can be set.
-     *
-     *                  The direction of iteration (fixed for StrictQueue):
-     *                  - StrictQueue::IT_MODE_FIFO (queue style)
-     *
-     *                  The behavior of the iterator (either one or the other):
-     *                  - StrictQueue::IT_MODE_DELETE (delete items)
-     *                  - StrictQueue::IT_MODE_KEEP (keep items)
-     *
-     *                  The default mode is: IT_MODE_FIFO | IT_MODE_KEEP
-     *
-     * @return int The set of flags and modes of iteration
-     *
-     * @throws RangeException if an invalid `$mode` is given
-     * @throws RuntimeException if trying to change iterator direction
-     *
-     * @api
-     */
-    final public function setIteratorMode(int $mode): int
-    {
-        if ($mode > 1) {
-            throw new RuntimeException(
-                sprintf(
-                    'Changing the iterator direction of %s is prohibited.',
-                    static::class
-                )
-            );
-        }
-        return parent::setIteratorMode($mode);
-    }
-
-    /**
-     * Create a type-sensitive, traversable queue of items.
-     *
-     * @param string[] $allowedTypes Allowed data types of items (optional)
-     *
-     *                               If empty, all types are allowed.
-     *                               Possible values are:
-     *                               - "array"
-     *                               - "bool"
-     *                               - "callable"
-     *                               - "countable"
-     *                               - "float" or "double"
-     *                               - "int" or "integer" or "long"
-     *                               - "iterable"
-     *                               - "null"
-     *                               - "numeric"
-     *                               - "object" or FQCN
-     *                               - "resource"
-     *                               - "scalar"
-     *                               - "string"
-     *
-     * @return void
-     *
-     * @throws InvalidArgumentException if any value of `$allowedTypes` is not a string
-     */
-    public function __construct(array $allowedTypes = [])
-    {
-        parent::__construct($allowedTypes);
-        $this->setIteratorMode(0);
+        $this->push($value);
     }
 }
diff --git a/doc/files/src/DataStructures/StrictSplDatastructureTrait.php.txt b/doc/files/src/DataStructures/StrictSplDatastructureTrait.php.txt
new file mode 100644
index 0000000..8608abc
--- /dev/null
+++ b/doc/files/src/DataStructures/StrictSplDatastructureTrait.php.txt
@@ -0,0 +1,420 @@
+<?php
+
+/**
+ * PHP Basics
+ *
+ * Copyright (C) 2024 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace OCC\Basics\DataStructures;
+
+use InvalidArgumentException;
+use OCC\Basics\Traits\TypeChecker;
+use OutOfRangeException;
+
+use function get_debug_type;
+use function iterator_to_array;
+use function serialize;
+use function sprintf;
+use function unserialize;
+
+/**
+ * The common interface of all type-sensitive, SPL-based datastructures.
+ *
+ * This extends all methods of the common interface of the Standard PHP Library
+ * [Doubly Linked List Datastructures](https://www.php.net/spl.datastructures)
+ * by type-checking to only allow specified data types on the list.
+ *
+ * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ * @package Basics\DataStructures
+ *
+ * @template AllowedType of mixed
+ */
+trait StrictSplDatastructureTrait
+{
+    use TypeChecker {
+        setAllowedTypes as protected;
+    }
+
+    /**
+     * Add/insert a new item at the specified offset.
+     *
+     * @param int $offset The offset where the new item is to be inserted
+     * @param AllowedType $value The new item for the offset
+     *
+     * @return void
+     *
+     * @throws InvalidArgumentException if `$value` is not of allowed type
+     * @throws OutOfRangeException when `$offset` is out of bounds
+     *
+     * @api
+     */
+    public function add(int $offset, mixed $value): void
+    {
+        $this->offsetSet($offset, $value);
+    }
+
+    /**
+     * Append items at the end of the list.
+     *
+     * @param AllowedType ...$values One or more items to append
+     *
+     * @return void
+     *
+     * @throws InvalidArgumentException if any `$values` is not of allowed type
+     *
+     * @api
+     */
+    public function append(mixed ...$values): void
+    {
+        /** @var array<int, AllowedType> $values */
+        foreach ($values as $count => $value) {
+            if (!$this->hasAllowedType($value)) {
+                throw new InvalidArgumentException(
+                    sprintf(
+                        'Parameter %d must be an allowed type, %s given.',
+                        $count + 1,
+                        get_debug_type($value)
+                    )
+                );
+            }
+        }
+        foreach ($values as $value) {
+            parent::push($value);
+        }
+    }
+
+    /**
+     * Clear the list of any items.
+     *
+     * @return void
+     *
+     * @api
+     */
+    public function clear(): void
+    {
+        while (!$this->isEmpty()) {
+            $this->pop();
+        }
+        $this->rewind();
+    }
+
+    /**
+     * Get the item at the specified index.
+     *
+     * @param int $offset The item's index
+     *
+     * @return AllowedType The item
+     *
+     * @throws OutOfRangeException when `$offset` is out of bounds
+     *
+     * @api
+     */
+    public function get(int $offset): mixed
+    {
+        return $this->offsetGet($offset);
+    }
+
+    /**
+     * Check if this can be considered a list.
+     *
+     * @return true Always TRUE (this exists only for compatibility reasons)
+     *
+     * @api
+     */
+    public function isList(): bool
+    {
+        return true;
+    }
+
+    /**
+     * Set the item at the specified offset.
+     *
+     * @param ?int $offset The offset being set or NULL to append
+     * @param AllowedType $value The new item for the offset
+     *
+     * @return void
+     *
+     * @throws InvalidArgumentException if `$value` is not of allowed type
+     * @throws OutOfRangeException when `$offset` is out of bounds
+     *
+     * @api
+     */
+    public function offsetSet(mixed $offset, mixed $value): void
+    {
+        if (!$this->hasAllowedType($value)) {
+            throw new InvalidArgumentException(
+                sprintf(
+                    'Parameter 2 must be an allowed type, %s given.',
+                    get_debug_type($value)
+                )
+            );
+        }
+        /** @psalm-suppress PossiblyNullArgument */
+        parent::offsetSet($offset, $value);
+    }
+
+    /**
+     * Prepend items at the start of the list.
+     *
+     * @param AllowedType ...$values One or more items to prepend
+     *
+     * @return void
+     *
+     * @throws InvalidArgumentException if `$value` is not of allowed type
+     *
+     * @api
+     */
+    public function prepend(mixed ...$values): void
+    {
+        /** @var array<int, AllowedType> $values */
+        foreach ($values as $count => $value) {
+            if (!$this->hasAllowedType($value)) {
+                throw new InvalidArgumentException(
+                    sprintf(
+                        'Parameter %d must be an allowed type, %s given.',
+                        $count + 1,
+                        get_debug_type($value)
+                    )
+                );
+            }
+        }
+        foreach ($values as $value) {
+            parent::unshift($value);
+        }
+    }
+
+    /**
+     * Push an item at the end of the list.
+     *
+     * @param AllowedType $value The item to push
+     *
+     * @return void
+     *
+     * @throws InvalidArgumentException if `$value` is not of allowed type
+     *
+     * @api
+     */
+    public function push(mixed $value): void
+    {
+        if (!$this->hasAllowedType($value)) {
+            throw new InvalidArgumentException(
+                sprintf(
+                    'Parameter 1 must be an allowed type, %s given.',
+                    get_debug_type($value)
+                )
+            );
+        }
+        parent::push($value);
+    }
+
+    /**
+     * Remove an item from the list.
+     *
+     * @param int $offset The item's index
+     *
+     * @return void
+     *
+     * @throws OutOfRangeException when `$offset` is out of bounds
+     *
+     * @api
+     */
+    public function remove(int $offset): void
+    {
+        $this->offsetUnset($offset);
+    }
+
+    /**
+     * Get string representation of $this.
+     *
+     * @return string The string representation
+     *
+     * @internal
+     */
+    public function serialize(): string
+    {
+        return serialize($this->__serialize());
+    }
+
+    /**
+     * Set an item at the specified index.
+     *
+     * @param int $offset The item's index
+     * @param AllowedType $value The item
+     *
+     * @return void
+     *
+     * @throws InvalidArgumentException if `$value` is not of allowed type
+     *
+     * @api
+     */
+    public function set(int $offset, mixed $value): void
+    {
+        $this->offsetSet($offset, $value);
+    }
+
+    /**
+     * Return array representation of list.
+     *
+     * @return array<int, AllowedType> Array of list items
+     *
+     * @api
+     */
+    public function toArray(): array
+    {
+        return iterator_to_array($this, true);
+    }
+
+    /**
+     * Turn list into a type-sensitive collection.
+     *
+     * @return StrictCollection<AllowedType> A type-sensitive collection of the list's items
+     *
+     * @api
+     */
+    public function toStrictCollection(): StrictCollection
+    {
+        $strictCollection = new StrictCollection($this->getAllowedTypes());
+        foreach ($this->toArray() as $offset => $value) {
+            $strictCollection[$offset] = $value;
+        }
+        return $strictCollection;
+    }
+
+    /**
+     * Restore $this from string representation.
+     *
+     * @param string $data The string representation
+     *
+     * @return void
+     *
+     * @internal
+     */
+    public function unserialize($data): void
+    {
+        /** @var mixed[] $dataArray */
+        $dataArray = unserialize($data);
+        $this->__unserialize($dataArray);
+    }
+
+    /**
+     * Prepend the list with an item.
+     *
+     * @param AllowedType $value The item to unshift
+     *
+     * @return void
+     *
+     * @throws InvalidArgumentException if `$value` is not of allowed type
+     *
+     * @api
+     */
+    public function unshift(mixed $value): void
+    {
+        if (!$this->hasAllowedType($value)) {
+            throw new InvalidArgumentException(
+                sprintf(
+                    'Parameter 1 must be an allowed type, %s given.',
+                    get_debug_type($value)
+                )
+            );
+        }
+        parent::unshift($value);
+    }
+
+    /**
+     * Create a type-sensitive, traversable list of items.
+     *
+     * @param string[] $allowedTypes Allowed data types of items (optional)
+     *
+     *                               If empty, all types are allowed.
+     *                               Possible values are:
+     *                               - "array"
+     *                               - "bool"
+     *                               - "callable"
+     *                               - "countable"
+     *                               - "float" or "double"
+     *                               - "int" or "integer" or "long"
+     *                               - "iterable"
+     *                               - "null"
+     *                               - "numeric"
+     *                               - "object" or FQCN
+     *                               - "resource"
+     *                               - "scalar"
+     *                               - "string"
+     *
+     * @return void
+     *
+     * @throws InvalidArgumentException if any value of `$allowedTypes` is not a string
+     */
+    public function __construct(array $allowedTypes = [])
+    {
+        $this->setAllowedTypes($allowedTypes);
+    }
+
+    /**
+     * Get debug information for $this.
+     *
+     * @return mixed[] The debug information
+     *
+     * @internal
+     */
+    public function __debugInfo(): array
+    {
+        return $this->__serialize();
+    }
+
+    /**
+     * Get array representation of $this.
+     *
+     * @return mixed[] The array representation
+     *
+     * @internal
+     */
+    public function __serialize(): array
+    {
+        return [
+            'StrictSplDatastructure::allowedTypes' => $this->getAllowedTypes(),
+            'StrictSplDatastructure::dllist' => $this->toArray(),
+            'StrictSplDatastructure::flags' => $this->getIteratorMode()
+        ];
+    }
+
+    /**
+     * Restore $this from array representation.
+     *
+     * @param mixed[] $data The array representation
+     *
+     * @return void
+     *
+     * @internal
+     *
+     * @psalm-suppress MethodSignatureMismatch
+     */
+    public function __unserialize(array $data): void
+    {
+        /** @var string[] $allowedTypes */
+        $allowedTypes = $data['StrictSplDatastructure::allowedTypes'];
+        $this->setAllowedTypes($allowedTypes);
+        /** @var array<int, AllowedType> $values */
+        $values = $data['StrictSplDatastructure::dllist'];
+        $this->append(...$values);
+        /** @var int $flags */
+        $flags = $data['StrictSplDatastructure::flags'];
+        $this->setIteratorMode($flags);
+    }
+}
diff --git a/doc/files/src/DataStructures/StrictStack.php.txt b/doc/files/src/DataStructures/StrictStack.php.txt
index 357897e..8ec5cda 100644
--- a/doc/files/src/DataStructures/StrictStack.php.txt
+++ b/doc/files/src/DataStructures/StrictStack.php.txt
@@ -23,24 +23,17 @@ declare(strict_types=1);
 
 namespace OCC\Basics\DataStructures;
 
-use ArrayAccess;
-use Countable;
-use InvalidArgumentException;
-use Iterator;
-use RangeException;
+use OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException;
+use OCC\Basics\DataStructures\Traits\StrictSplDatastructureTrait;
 use RuntimeException;
-use Serializable;
-
-use function sprintf;
+use SplStack;
 
 /**
  * A type-sensitive, taversable stack (LIFO).
  *
- * Extends [\SplDoublyLinkedList](https://www.php.net/spldoublylinkedlist) with
- * an option to restrict the allowed data types for list items by providing the
- * constructor with an array of atomic types or fully qualified class names. It
- * also restricts the iterator direction to last-in, first-out (LIFO) exactly
- * like [\SplStack](https://www.php.net/splstack).
+ * Extends [\SplStack](https://www.php.net/splstack) with an option to restrict
+ * the allowed data types for list items by providing the constructor with an
+ * array of atomic types or fully qualified class names.
  *
  * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
  * @package Basics\DataStructures
@@ -48,12 +41,13 @@ use function sprintf;
  * @api
  *
  * @template AllowedType of mixed
- * @extends StrictList<AllowedType>
- * @implements ArrayAccess<int, AllowedType>
- * @implements Iterator<AllowedType>
+ * @extends SplStack<AllowedType>
  */
-class StrictStack extends StrictList implements ArrayAccess, Countable, Iterator, Serializable
+class StrictStack extends SplStack
 {
+    /** @use StrictSplDatastructureTrait<AllowedType> */
+    use StrictSplDatastructureTrait;
+
     /**
      * Add an item to the stack.
      *
@@ -61,13 +55,13 @@ class StrictStack extends StrictList implements ArrayAccess, Countable, Iterator
      *
      * @return void
      *
-     * @throws InvalidArgumentException if `$value` is not of allowed type
+     * @throws InvalidDataTypeException if `$value` is not of allowed type
      *
      * @api
      */
     public function stack(mixed $value): void
     {
-        parent::push($value);
+        $this->push($value);
     }
 
     /**
@@ -75,77 +69,12 @@ class StrictStack extends StrictList implements ArrayAccess, Countable, Iterator
      *
      * @return AllowedType The unstacked item
      *
+     * @throws RuntimeException if the list is empty
+     *
      * @api
      */
     public function unstack(): mixed
     {
-        return parent::pop();
-    }
-
-    /**
-     * Set the mode of iteration.
-     *
-     * @param int $mode The new iterator mode (2 or 3)
-     *
-     *                  There are two orthogonal sets of modes that can be set.
-     *
-     *                  The direction of iteration (fixed for StrictStack):
-     *                  - StrictStack::IT_MODE_LIFO (stack style)
-     *
-     *                  The behavior of the iterator (either one or the other):
-     *                  - StrictStack::IT_MODE_DELETE (delete items)
-     *                  - StrictStack::IT_MODE_KEEP (keep items)
-     *
-     *                  The default mode is: IT_MODE_LIFO | IT_MODE_KEEP
-     *
-     * @return int The set of flags and modes of iteration
-     *
-     * @throws RangeException if an invalid `$mode` is given
-     * @throws RuntimeException if trying to change iterator direction
-     *
-     * @api
-     */
-    final public function setIteratorMode(int $mode): int
-    {
-        if ($mode < 2) {
-            throw new RuntimeException(
-                sprintf(
-                    'Changing the iterator direction of %s is prohibited.',
-                    static::class
-                )
-            );
-        }
-        return parent::setIteratorMode($mode);
-    }
-
-    /**
-     * Create a type-sensitive, traversable stack of items.
-     *
-     * @param string[] $allowedTypes Allowed data types of items (optional)
-     *
-     *                               If empty, all types are allowed.
-     *                               Possible values are:
-     *                               - "array"
-     *                               - "bool"
-     *                               - "callable"
-     *                               - "countable"
-     *                               - "float" or "double"
-     *                               - "int" or "integer" or "long"
-     *                               - "iterable"
-     *                               - "null"
-     *                               - "numeric"
-     *                               - "object" or FQCN
-     *                               - "resource"
-     *                               - "scalar"
-     *                               - "string"
-     *
-     * @return void
-     *
-     * @throws InvalidArgumentException if any value of `$allowedTypes` is not a string
-     */
-    public function __construct(array $allowedTypes = [])
-    {
-        parent::__construct($allowedTypes);
-        $this->setIteratorMode(2);
+        return $this->pop();
     }
 }
diff --git a/doc/files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt b/doc/files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt
new file mode 100644
index 0000000..982223a
--- /dev/null
+++ b/doc/files/src/DataStructures/Traits/StrictSplDatastructureTrait.php.txt
@@ -0,0 +1,422 @@
+<?php
+
+/**
+ * PHP Basics
+ *
+ * Copyright (C) 2024 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace OCC\Basics\DataStructures\Traits;
+
+use InvalidArgumentException;
+use OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException;
+use OCC\Basics\DataStructures\StrictCollection;
+use OCC\Basics\Traits\TypeChecker;
+use OutOfRangeException;
+
+use function get_debug_type;
+use function iterator_to_array;
+use function serialize;
+use function sprintf;
+use function unserialize;
+
+/**
+ * The common interface of all type-sensitive, SPL-based datastructures.
+ *
+ * This extends all methods of the common interface of the Standard PHP Library
+ * [Doubly Linked List Datastructures](https://www.php.net/spl.datastructures)
+ * by type-checking to only allow specified data types on the list.
+ *
+ * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ * @package Basics\DataStructures
+ *
+ * @template AllowedType of mixed
+ */
+trait StrictSplDatastructureTrait
+{
+    use TypeChecker {
+        setAllowedTypes as protected;
+    }
+
+    /**
+     * Add/insert a new item at the specified offset.
+     *
+     * @param int $offset The offset where the new item is to be inserted
+     * @param AllowedType $value The new item for the offset
+     *
+     * @return void
+     *
+     * @throws InvalidDataTypeException if `$value` is not of allowed type
+     * @throws OutOfRangeException when `$offset` is out of bounds
+     *
+     * @api
+     */
+    public function add(int $offset, mixed $value): void
+    {
+        $this->offsetSet($offset, $value);
+    }
+
+    /**
+     * Append items at the end of the list.
+     *
+     * @param AllowedType ...$values One or more items to append
+     *
+     * @return void
+     *
+     * @throws InvalidDataTypeException if any `$values` is not of allowed type
+     *
+     * @api
+     */
+    public function append(mixed ...$values): void
+    {
+        /** @var array<int, AllowedType> $values */
+        foreach ($values as $count => $value) {
+            if (!$this->hasAllowedType($value)) {
+                throw new InvalidDataTypeException(
+                    sprintf(
+                        'Parameter %d must be an allowed type, %s given.',
+                        $count + 1,
+                        get_debug_type($value)
+                    )
+                );
+            }
+        }
+        foreach ($values as $value) {
+            parent::push($value);
+        }
+    }
+
+    /**
+     * Clear the list of any items.
+     *
+     * @return void
+     *
+     * @api
+     */
+    public function clear(): void
+    {
+        while (!$this->isEmpty()) {
+            $this->pop();
+        }
+        $this->rewind();
+    }
+
+    /**
+     * Get the item at the specified index.
+     *
+     * @param int $offset The item's index
+     *
+     * @return AllowedType The item
+     *
+     * @throws OutOfRangeException when `$offset` is out of bounds
+     *
+     * @api
+     */
+    public function get(int $offset): mixed
+    {
+        return $this->offsetGet($offset);
+    }
+
+    /**
+     * Check if this can be considered a list.
+     *
+     * @return true Always TRUE (this exists only for compatibility reasons)
+     *
+     * @api
+     */
+    public function isList(): bool
+    {
+        return true;
+    }
+
+    /**
+     * Set the item at the specified offset.
+     *
+     * @param ?int $offset The offset being set or NULL to append
+     * @param AllowedType $value The new item for the offset
+     *
+     * @return void
+     *
+     * @throws InvalidDataTypeException if `$value` is not of allowed type
+     * @throws OutOfRangeException when `$offset` is out of bounds
+     *
+     * @api
+     */
+    public function offsetSet(mixed $offset, mixed $value): void
+    {
+        if (!$this->hasAllowedType($value)) {
+            throw new InvalidDataTypeException(
+                sprintf(
+                    'Parameter 2 must be an allowed type, %s given.',
+                    get_debug_type($value)
+                )
+            );
+        }
+        /** @psalm-suppress PossiblyNullArgument */
+        parent::offsetSet($offset, $value);
+    }
+
+    /**
+     * Prepend items at the start of the list.
+     *
+     * @param AllowedType ...$values One or more items to prepend
+     *
+     * @return void
+     *
+     * @throws InvalidDataTypeException if `$value` is not of allowed type
+     *
+     * @api
+     */
+    public function prepend(mixed ...$values): void
+    {
+        /** @var array<int, AllowedType> $values */
+        foreach ($values as $count => $value) {
+            if (!$this->hasAllowedType($value)) {
+                throw new InvalidDataTypeException(
+                    sprintf(
+                        'Parameter %d must be an allowed type, %s given.',
+                        $count + 1,
+                        get_debug_type($value)
+                    )
+                );
+            }
+        }
+        foreach ($values as $value) {
+            parent::unshift($value);
+        }
+    }
+
+    /**
+     * Push an item at the end of the list.
+     *
+     * @param AllowedType $value The item to push
+     *
+     * @return void
+     *
+     * @throws InvalidDataTypeException if `$value` is not of allowed type
+     *
+     * @api
+     */
+    public function push(mixed $value): void
+    {
+        if (!$this->hasAllowedType($value)) {
+            throw new InvalidDataTypeException(
+                sprintf(
+                    'Parameter 1 must be an allowed type, %s given.',
+                    get_debug_type($value)
+                )
+            );
+        }
+        parent::push($value);
+    }
+
+    /**
+     * Remove an item from the list.
+     *
+     * @param int $offset The item's index
+     *
+     * @return void
+     *
+     * @throws OutOfRangeException when `$offset` is out of bounds
+     *
+     * @api
+     */
+    public function remove(int $offset): void
+    {
+        $this->offsetUnset($offset);
+    }
+
+    /**
+     * Get string representation of $this.
+     *
+     * @return string The string representation
+     *
+     * @internal
+     */
+    public function serialize(): string
+    {
+        return serialize($this->__serialize());
+    }
+
+    /**
+     * Set an item at the specified index.
+     *
+     * @param int $offset The item's index
+     * @param AllowedType $value The item
+     *
+     * @return void
+     *
+     * @throws InvalidDataTypeException if `$value` is not of allowed type
+     *
+     * @api
+     */
+    public function set(int $offset, mixed $value): void
+    {
+        $this->offsetSet($offset, $value);
+    }
+
+    /**
+     * Return array representation of list.
+     *
+     * @return array<int, AllowedType> Array of list items
+     *
+     * @api
+     */
+    public function toArray(): array
+    {
+        return iterator_to_array($this, true);
+    }
+
+    /**
+     * Turn list into a type-sensitive collection.
+     *
+     * @return StrictCollection<AllowedType> A type-sensitive collection of the list's items
+     *
+     * @api
+     */
+    public function toStrictCollection(): StrictCollection
+    {
+        $strictCollection = new StrictCollection($this->getAllowedTypes());
+        foreach ($this->toArray() as $offset => $value) {
+            $strictCollection[$offset] = $value;
+        }
+        return $strictCollection;
+    }
+
+    /**
+     * Restore $this from string representation.
+     *
+     * @param string $data The string representation
+     *
+     * @return void
+     *
+     * @internal
+     */
+    public function unserialize($data): void
+    {
+        /** @var mixed[] $dataArray */
+        $dataArray = unserialize($data);
+        $this->__unserialize($dataArray);
+    }
+
+    /**
+     * Prepend the list with an item.
+     *
+     * @param AllowedType $value The item to unshift
+     *
+     * @return void
+     *
+     * @throws InvalidDataTypeException if `$value` is not of allowed type
+     *
+     * @api
+     */
+    public function unshift(mixed $value): void
+    {
+        if (!$this->hasAllowedType($value)) {
+            throw new InvalidDataTypeException(
+                sprintf(
+                    'Parameter 1 must be an allowed type, %s given.',
+                    get_debug_type($value)
+                )
+            );
+        }
+        parent::unshift($value);
+    }
+
+    /**
+     * Create a type-sensitive, traversable list of items.
+     *
+     * @param string[] $allowedTypes Allowed data types of items (optional)
+     *
+     *                               If empty, all types are allowed.
+     *                               Possible values are:
+     *                               - "array"
+     *                               - "bool"
+     *                               - "callable"
+     *                               - "countable"
+     *                               - "float" or "double"
+     *                               - "int" or "integer" or "long"
+     *                               - "iterable"
+     *                               - "null"
+     *                               - "numeric"
+     *                               - "object" or FQCN
+     *                               - "resource"
+     *                               - "scalar"
+     *                               - "string"
+     *
+     * @return void
+     *
+     * @throws InvalidArgumentException if any value of `$allowedTypes` is not a string
+     */
+    public function __construct(array $allowedTypes = [])
+    {
+        $this->setAllowedTypes($allowedTypes);
+    }
+
+    /**
+     * Get debug information for $this.
+     *
+     * @return mixed[] The debug information
+     *
+     * @internal
+     */
+    public function __debugInfo(): array
+    {
+        return $this->__serialize();
+    }
+
+    /**
+     * Get array representation of $this.
+     *
+     * @return mixed[] The array representation
+     *
+     * @internal
+     */
+    public function __serialize(): array
+    {
+        return [
+            'StrictSplDatastructure::allowedTypes' => $this->getAllowedTypes(),
+            'StrictSplDatastructure::dllist' => $this->toArray(),
+            'StrictSplDatastructure::flags' => $this->getIteratorMode()
+        ];
+    }
+
+    /**
+     * Restore $this from array representation.
+     *
+     * @param mixed[] $data The array representation
+     *
+     * @return void
+     *
+     * @internal
+     *
+     * @psalm-suppress MethodSignatureMismatch
+     */
+    public function __unserialize(array $data): void
+    {
+        /** @var string[] $allowedTypes */
+        $allowedTypes = $data['StrictSplDatastructure::allowedTypes'];
+        $this->setAllowedTypes($allowedTypes);
+        /** @var array<int, AllowedType> $values */
+        $values = $data['StrictSplDatastructure::dllist'];
+        $this->append(...$values);
+        /** @var int $flags */
+        $flags = $data['StrictSplDatastructure::flags'];
+        $this->setIteratorMode($flags);
+    }
+}
diff --git a/doc/files/src/Traits/TypeChecker.php.txt b/doc/files/src/Traits/TypeChecker.php.txt
new file mode 100644
index 0000000..9a2042a
--- /dev/null
+++ b/doc/files/src/Traits/TypeChecker.php.txt
@@ -0,0 +1,150 @@
+<?php
+
+/**
+ * PHP Basics
+ *
+ * Copyright (C) 2024 Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace OCC\Basics\Traits;
+
+use InvalidArgumentException;
+
+use function array_map;
+use function array_sum;
+use function array_values;
+use function count;
+use function function_exists;
+use function in_array;
+use function is_a;
+use function is_array;
+use function is_bool;
+use function is_callable;
+use function is_countable;
+use function is_double;
+use function is_float;
+use function is_int;
+use function is_integer;
+use function is_iterable;
+use function is_long;
+use function is_null;
+use function is_numeric;
+use function is_resource;
+use function is_scalar;
+use function is_string;
+use function is_object;
+use function ltrim;
+
+/**
+ * A generic data type checker.
+ *
+ * This allows to set a list of allowed atomic data types and fully qualified
+ * class names. It also provides a method to check if a value's data type
+ * matches at least one of these types.
+ *
+ * @author Sebastian Meyer <sebastian.meyer@opencultureconsulting.com>
+ * @package Basics\Traits
+ *
+ * @api
+ */
+trait TypeChecker
+{
+    /**
+     * The allowed data types.
+     *
+     * @var string[]
+     *
+     * @internal
+     */
+    protected array $_allowedTypes = [];
+
+    /**
+     * Get allowed data types.
+     *
+     * @return string[] The list of allowed data types
+     *
+     * @api
+     */
+    public function getAllowedTypes(): array
+    {
+        return $this->_allowedTypes;
+    }
+
+    /**
+     * Check if a value's data type is allowed.
+     *
+     * @param mixed $value The value to check
+     *
+     * @return bool Whether the value's data type is allowed
+     *
+     * @api
+     */
+    public function hasAllowedType(mixed $value): bool
+    {
+        if (count($this->getAllowedTypes()) === 0) {
+            return true;
+        }
+        foreach ($this->getAllowedTypes() as $type) {
+            $function = 'is_' . $type;
+            if (function_exists($function) && $function($value)) {
+                return true;
+            }
+            /** @var class-string $fqcn */
+            $fqcn = ltrim($type, '\\');
+            if (is_object($value) && is_a($value, $fqcn)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Check if a data type is allowed.
+     *
+     * @param string $type The type to check
+     *
+     * @return bool Whether the data type is allowed
+     *
+     * @api
+     */
+    public function isAllowedType(string $type): bool
+    {
+        return in_array($type, $this->getAllowedTypes(), true);
+    }
+
+    /**
+     * Set allowed data types.
+     *
+     * @param string[] $allowedTypes Allowed data types
+     *
+     * @return void
+     *
+     * @throws InvalidArgumentException if any value of `$allowedTypes` is not a string
+     *
+     * @api
+     */
+    public function setAllowedTypes(array $allowedTypes = []): void
+    {
+        if (array_sum(array_map('is_string', $allowedTypes)) !== count($allowedTypes)) {
+            throw new InvalidArgumentException(
+                'Allowed types must be array of strings or empty array.'
+            );
+        }
+        $this->_allowedTypes = array_values($allowedTypes);
+    }
+}
diff --git a/doc/graphs/classes.html b/doc/graphs/classes.html
index ec4f91d..8cb5de0 100644
--- a/doc/graphs/classes.html
+++ b/doc/graphs/classes.html
@@ -64,6 +64,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/guides/changelog.html b/doc/guides/changelog.html
index b2a7442..6fe3a39 100644
--- a/doc/guides/changelog.html
+++ b/doc/guides/changelog.html
@@ -77,6 +77,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -153,7 +171,12 @@
                                         <div class="section" id="changelog">
     <h1>Changelog</h1>
 
-            <div class="contents"><ul class="phpdocumentor-list"><li class="toc-item"><a href="guides/changelog.html#v2-0-0">v2.0.0</a></li><li class="toc-item"><a href="guides/changelog.html#v1-1-0">v1.1.0</a></li><li class="toc-item"><a href="guides/changelog.html#v1-0-1">v1.0.1</a></li><li class="toc-item"><a href="guides/changelog.html#v1-0-0">v1.0.0</a></li></ul></div>
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
+        <div class="contents"><ul class="phpdocumentor-list"><li class="toc-item"><a href="guides/changelog.html#v2-0-0">v2.0.0</a></li><li class="toc-item"><a href="guides/changelog.html#v1-1-0">v1.1.0</a></li><li class="toc-item"><a href="guides/changelog.html#v1-0-1">v1.0.1</a></li><li class="toc-item"><a href="guides/changelog.html#v1-0-0">v1.0.0</a></li></ul></div>
+    </div>
+</div>
+
             <div class="section" id="v2-0-0">
     <h2>v2.0.0</h2>
 
@@ -197,7 +220,14 @@ function _magicSet{PascalCasePropertyName}(mixed $value): void</code></pre></li>
     <li>Added new trait <a href="classes/OCC-Basics-Traits-OverloadingSetter.html"><abbr title="\OCC\Basics\Traits\OverloadingSetter">OverloadingSetter</abbr></a>
 </li>
 
-    <li>Extended API for all datastructures</li>
+    <li>Added new trait <a href="classes/OCC-Basics-Traits-TypeChecker.html"><abbr title="\OCC\Basics\Traits\TypeChecker">TypeChecker</abbr></a>
+</li>
+
+    <li>Extended API for all datastructures (see <a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html"><abbr title="\OCC\Basics\DataStructures\Traits\StrictSplDatastructureTrait">StrictSplDatastructureTrait</abbr></a>
+)</li>
+
+    <li>Introduced <a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a>
+ for strict datastructures</li>
 
     <li>Extended <a href="https://opencultureconsulting.github.io/php-basics/">documentation</a></li>
 
diff --git a/doc/guides/index.html b/doc/guides/index.html
index fb669ee..a401e0d 100644
--- a/doc/guides/index.html
+++ b/doc/guides/index.html
@@ -2,8 +2,7 @@
 <html lang="en">
 <head>
     <meta charset="utf-8">
-    <meta name="layout" content="landingpage" />
-        <title>PHP Basics</title>
+            <title>PHP Basics</title>
     
 
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
@@ -78,6 +77,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -154,7 +171,40 @@
                                         <div class="section" id="documentation">
     <h1>Documentation</h1>
 
-            
+            <div class="toc">
+    <ul class="phpdocumentor-list">
+    <li class="toc-item"><a href="guides/overview/index.html#overview">Overview</a>        <ul class="menu-level-1">
+            <li class="toc-item"><a href="guides/overview/datastructures.html#typed-datastructures">Typed Datastructures</a></li>
+
+            <li class="toc-item"><a href="guides/overview/errorhandlers.html#error-and-exception-handlers">Error and Exception Handlers</a></li>
+
+            <li class="toc-item"><a href="guides/overview/interfaces.html#interface-traits">Interface Traits</a></li>
+
+            <li class="toc-item"><a href="guides/overview/traits.html#traits">Traits</a></li>
+
+                    </ul></li>
+
+    <li class="toc-item"><a href="guides/usage/index.html#user-guide">User Guide</a>        <ul class="menu-level-1">
+            <li class="toc-item"><a href="guides/usage/requirements.html#requirements">Requirements</a></li>
+
+            <li class="toc-item"><a href="guides/usage/installation.html#installation">Installation</a></li>
+
+                    </ul></li>
+
+    <li class="toc-item"><a href="guides/changelog.html#changelog">Changelog</a>        <ul class="section-level-1">
+            <li class="toc-item"><a href="guides/changelog.html#v2-0-0">v2.0.0</a></li>
+
+            <li class="toc-item"><a href="guides/changelog.html#v1-1-0">v1.1.0</a></li>
+
+            <li class="toc-item"><a href="guides/changelog.html#v1-0-1">v1.0.1</a></li>
+
+            <li class="toc-item"><a href="guides/changelog.html#v1-0-0">v1.0.0</a></li>
+
+                    </ul></li>
+
+    </ul>
+</div>
+
     </div>
 
                             </div>
diff --git a/doc/guides/overview/datastructures.html b/doc/guides/overview/datastructures.html
new file mode 100644
index 0000000..9531241
--- /dev/null
+++ b/doc/guides/overview/datastructures.html
@@ -0,0 +1,289 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PHP Basics</title>
+    
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PHP Basics</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
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+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
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+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
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+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
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+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
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+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-basics.html" class="">Basics</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/Basics.html" class="">Basics</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="packages/Basics-DataStructures.html" class="">DataStructures</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-ErrorHandlers.html" class="">ErrorHandlers</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-Interfaces.html" class="">Interfaces</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-Traits.html" class="">Traits</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="typed-datastructures">
+    <h1>Typed Datastructures</h1>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
+        <div class="contents"><ul class="phpdocumentor-list"><li class="toc-item"><a href="guides/overview/datastructures.html#strictcollection">StrictCollection</a></li><li class="toc-item"><a href="guides/overview/datastructures.html#strictlist">StrictList</a></li><li class="toc-item"><a href="guides/overview/datastructures.html#strictqueue">StrictQueue</a></li><li class="toc-item"><a href="guides/overview/datastructures.html#strictstack">StrictStack</a></li></ul></div>
+    </div>
+</div>
+
+            <p>All datastructures in this package have in common that you can control the types of items they can hold.</p>
+            <p>To restrict allowed data types for items, provide the constructor with an array of atomic types or fully qualified
+class names you want to allow as item types. Available atomic types are <code>array</code>, <code>bool</code>, <code>callable</code>, <code>countable</code>,
+<code>float</code> / <code>double</code>, <code>int</code> / <code>integer</code> / <code>long</code>, <code>iterable</code>, <code>null</code>, <code>numeric</code>, <code>object</code>, <code>resource</code>, <code>scalar</code> and
+<code>string</code>.</p>
+            <p>Trying to add an item with a data type not on the list of allowed types to a strict datastructure will result in an
+<a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a>
+.</p>
+            <blockquote><p>Examples:</p><pre><code class="language-php">// create a collection of strings
+$stringCollection = new StrictCollection([&#039;string&#039;]);
+
+// create a queue of PSR-15 middlewares
+$middlewareQueue = new StrictQueue([&#039;Psr\Http\Server\MiddlewareInterface&#039;]);</code></pre></blockquote>
+
+            <div class="section" id="strictcollection">
+    <h2>StrictCollection</h2>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">API Documentation</p>
+        <p><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a></p>
+    </div>
+</div>
+
+            <p><em>A type-sensitive, unsorted collection of items.</em></p>
+            <p>Holds items as key/value pairs where keys identify the items and have to be valid array keys while values can be of any
+controlled type.</p>
+            <p>A <code>StrictCollection</code> can be accessed like an array, but not traversed because it has no particular order. Technically
+speaking, <code>StrictCollection</code> implements <a href="https://www.php.net/arrayaccess">\ArrayAccess</a>, <a href="https://www.php.net/countable">\Countable</a> and <a href="https://www.php.net/serializable">\Serializable</a>, but no <a href="https://www.php.net/traversable">\Traversable</a> interface.</p>
+            <div class="phpdocumentor-admonition note">
+            <svg class="phpdocumentor-admonition__icon" fill="none" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M7 8h10M7 12h4m1 8l-4-4H5a2 2 0 01-2-2V6a2 2 0 012-2h14a2 2 0 012 2v8a2 2 0 01-2 2h-3l-4 4z"></path></svg>
+                    <article>
+        <p>Internally it holds the items in the <code>$_data</code> array, the same as most <a href="namespaces/occ-basics-interfaces.html"><abbr title="\OCC\Basics\Interfaces">Interfaces</abbr></a>
+ and
+<a href="namespaces/occ-basics-traits.html"><abbr title="\OCC\Basics\Traits">Traits</abbr></a>
+ of this package.</p>
+    </article>
+</div>
+
+    </div>
+
+            <div class="section" id="strictlist">
+    <h2>StrictList</h2>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">API Documentation</p>
+        <p><a href="classes/OCC-Basics-DataStructures-StrictList.html"><abbr title="\OCC\Basics\DataStructures\StrictList">StrictList</abbr></a></p>
+    </div>
+</div>
+
+            <p><em>A type-sensitive, taversable list of items.</em></p>
+            <p>Extends <a href="https://www.php.net/spldoublylinkedlist">\SplDoublyLinkedList</a> with an option to restrict the allowed data
+types for list items.</p>
+    </div>
+
+            <div class="section" id="strictqueue">
+    <h2>StrictQueue</h2>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">API Documentation</p>
+        <p><a href="classes/OCC-Basics-DataStructures-StrictQueue.html"><abbr title="\OCC\Basics\DataStructures\StrictQueue">StrictQueue</abbr></a></p>
+    </div>
+</div>
+
+            <p><em>A type-sensitive, taversable queue (FIFO) of items.</em></p>
+            <p>Extends <a href="https://www.php.net/spldoublylinkedlist">\SplDoublyLinkedList</a> with an option to restrict the allowed data
+types for list items.</p>
+    </div>
+
+            <div class="section" id="strictstack">
+    <h2>StrictStack</h2>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">API Documentation</p>
+        <p><a href="classes/OCC-Basics-DataStructures-StrictStack.html"><abbr title="\OCC\Basics\DataStructures\StrictStack">StrictStack</abbr></a></p>
+    </div>
+</div>
+
+            <p><em>A type-sensitive, taversable stack (LIFO) of items.</em></p>
+            <p>Extends <a href="https://www.php.net/spldoublylinkedlist">\SplDoublyLinkedList</a> with an option to restrict the allowed data
+types for list items.</p>
+    </div>
+
+    </div>
+
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="guides/overview/datastructures.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>
diff --git a/doc/guides/overview/errorhandlers.html b/doc/guides/overview/errorhandlers.html
new file mode 100644
index 0000000..c1aa4b3
--- /dev/null
+++ b/doc/guides/overview/errorhandlers.html
@@ -0,0 +1,225 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PHP Basics</title>
+    
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PHP Basics</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
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+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
+                                                                        <i class="fab fa-github"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-basics.html" class="">Basics</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/Basics.html" class="">Basics</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="packages/Basics-DataStructures.html" class="">DataStructures</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-ErrorHandlers.html" class="">ErrorHandlers</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-Interfaces.html" class="">Interfaces</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-Traits.html" class="">Traits</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="error-and-exception-handlers">
+    <h1>Error and Exception Handlers</h1>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
+        <div class="contents"><ul class="phpdocumentor-list"><li class="toc-item"><a href="guides/overview/errorhandlers.html#throwerrorexception">ThrowErrorException</a></li><li class="toc-item"><a href="guides/overview/errorhandlers.html#triggerexceptionerror">TriggerExceptionError</a></li></ul></div>
+    </div>
+</div>
+
+            <div class="section" id="throwerrorexception">
+    <h2>ThrowErrorException</h2>
+
+            <p>Throws internal errors as exceptions.</p>
+            <p>If registered as error handler, this converts an internal PHP error into an
+<code>ErrorException</code>. It respects the <code>error_reporting</code> directive.</p>
+            <p>&gt; Usage: <code>set_error_handler(new ThrowErrorException());</code></p>
+    </div>
+
+            <div class="section" id="triggerexceptionerror">
+    <h2>TriggerExceptionError</h2>
+
+            <p>Triggers errors for uncaught exceptions.</p>
+            <p>If registered as exception handler, this catches an uncaught exception and
+converts it into an internal PHP error of severity <code>E_USER_ERROR</code>.</p>
+            <p>&gt; Usage: <code>set_exception_handler(new TriggerExceptionError());</code></p>
+    </div>
+
+    </div>
+
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
+        </section>
+    </section>
+</section>
+        </div>
+        <a href="guides/overview/errorhandlers.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
+
+    </main>
+
+    <script>
+        cssVars({});
+    </script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
+</body>
+</html>
diff --git a/doc/guides/overview/index.html b/doc/guides/overview/index.html
index 31beab0..51e9d41 100644
--- a/doc/guides/overview/index.html
+++ b/doc/guides/overview/index.html
@@ -77,6 +77,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -153,6 +171,64 @@
                                         <div class="section" id="overview">
     <h1>Overview</h1>
 
+            <p>The package currently contains classes for <a href="guides/overview/datastructures.html">Typed Datastructures</a>
+, <a href="guides/overview/errorhandlers.html">Error and Exception Handlers</a>
+, multiple <a href="guides/overview/interfaces.html">Interface Traits</a>
+, and
+more generic <a href="guides/overview/traits.html">Traits</a>
+ for common use cases. They share the same design principles like property and method naming
+schema, the highest coding standards of <a href="https://phpstan.org/">PHPStan</a> and <a href="https://psalm.dev/">Psalm</a>, and full
+<a href="https://www.php-fig.org/psr/psr-12/">PSR-12</a> compliance to make sure they can be combined and easily re-used in
+other projects.</p>
+            <div class="toc">
+    <ul class="phpdocumentor-list">
+    <li class="toc-item"><a href="guides/overview/datastructures.html#typed-datastructures">Typed Datastructures</a>        <ul class="section-level-1">
+            <li class="toc-item"><a href="guides/overview/datastructures.html#strictcollection">StrictCollection</a></li>
+
+            <li class="toc-item"><a href="guides/overview/datastructures.html#strictlist">StrictList</a></li>
+
+            <li class="toc-item"><a href="guides/overview/datastructures.html#strictqueue">StrictQueue</a></li>
+
+            <li class="toc-item"><a href="guides/overview/datastructures.html#strictstack">StrictStack</a></li>
+
+                    </ul></li>
+
+    <li class="toc-item"><a href="guides/overview/errorhandlers.html#error-and-exception-handlers">Error and Exception Handlers</a>        <ul class="section-level-1">
+            <li class="toc-item"><a href="guides/overview/errorhandlers.html#throwerrorexception">ThrowErrorException</a></li>
+
+            <li class="toc-item"><a href="guides/overview/errorhandlers.html#triggerexceptionerror">TriggerExceptionError</a></li>
+
+                    </ul></li>
+
+    <li class="toc-item"><a href="guides/overview/interfaces.html#interface-traits">Interface Traits</a>        <ul class="section-level-1">
+            <li class="toc-item"><a href="guides/overview/interfaces.html#arrayaccesstrait">ArrayAccessTrait</a></li>
+
+            <li class="toc-item"><a href="guides/overview/interfaces.html#countabletrait">CountableTrait</a></li>
+
+            <li class="toc-item"><a href="guides/overview/interfaces.html#iteratoraggregatetrait">IteratorAggregateTrait</a></li>
+
+            <li class="toc-item"><a href="guides/overview/interfaces.html#iteratortrait">IteratorTrait</a></li>
+
+                    </ul></li>
+
+    <li class="toc-item"><a href="guides/overview/traits.html#traits">Traits</a>        <ul class="section-level-1">
+            <li class="toc-item"><a href="guides/overview/traits.html#getter">Getter</a></li>
+
+            <li class="toc-item"><a href="guides/overview/traits.html#overloadinggetter">OverloadingGetter</a></li>
+
+            <li class="toc-item"><a href="guides/overview/traits.html#overloadingsetter">OverloadingSetter</a></li>
+
+            <li class="toc-item"><a href="guides/overview/traits.html#setter">Setter</a></li>
+
+            <li class="toc-item"><a href="guides/overview/traits.html#singleton">Singleton</a></li>
+
+            <li class="toc-item"><a href="guides/overview/traits.html#typechecker">TypeChecker</a></li>
+
+                    </ul></li>
+
+    </ul>
+</div>
+
     </div>
 
                             </div>
diff --git a/doc/guides/overview/interfaces.html b/doc/guides/overview/interfaces.html
new file mode 100644
index 0000000..d257f28
--- /dev/null
+++ b/doc/guides/overview/interfaces.html
@@ -0,0 +1,235 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PHP Basics</title>
+    
+
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <base href="../../">
+    <link rel="icon" href="images/favicon.ico"/>
+    <link rel="stylesheet" href="css/normalize.css">
+    <link rel="stylesheet" href="css/base.css">
+            <link rel="preconnect" href="https://fonts.gstatic.com">
+        <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@100;200;300;400;600;700&display=swap" rel="stylesheet">
+        <link href="https://fonts.googleapis.com/css2?family=Source+Code+Pro:wght@400;600;700&display=swap" rel="stylesheet">
+        <link rel="stylesheet" href="css/template.css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.0/css/all.min.css" integrity="sha256-ybRkN9dBjhcS2qrW1z+hfCxq+1aBdwyQM5wlQoQVt/0=" crossorigin="anonymous" />
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/themes/prism-okaidia.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.css">
+        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.css">
+                <script src="https://cdn.jsdelivr.net/npm/fuse.js@3.4.6"></script>
+        <script src="https://cdn.jsdelivr.net/npm/css-vars-ponyfill@2"></script>
+        <script src="js/template.js"></script>
+        <script src="js/search.js"></script>
+        <script defer src="js/searchIndex.js"></script>
+    </head>
+<body id="top">
+    <header class="phpdocumentor-header phpdocumentor-section">
+    <h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">PHP Basics</a></h1>
+    <input class="phpdocumentor-header__menu-button" type="checkbox" id="menu-button" name="menu-button" />
+    <label class="phpdocumentor-header__menu-icon" for="menu-button">
+        <i class="fas fa-bars"></i>
+    </label>
+    <section data-search-form class="phpdocumentor-search">
+    <label>
+        <span class="visually-hidden">Search for</span>
+        <svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
+            <circle cx="7.5" cy="7.5" r="6.5" stroke="currentColor" stroke-width="2"/>
+            <line x1="12.4892" y1="12.2727" x2="19.1559" y2="18.9393" stroke="currentColor" stroke-width="3"/>
+        </svg>
+        <input type="search" class="phpdocumentor-field phpdocumentor-search__field" placeholder="Loading .." disabled />
+    </label>
+</section>
+
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+<nav class="phpdocumentor-topnav">
+    <ul class="phpdocumentor-topnav__menu">
+                        <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://packagist.org/packages/opencultureconsulting/basics">
+                    <span>
+                                                                        <i class="fab fa-php"></i>
+                                                
+                    </span>
+                </a>
+            </li>
+                    <li class="phpdocumentor-topnav__menu-item -menu">
+                <a href="https://github.com/opencultureconsulting/php-basics">
+                    <span>
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+                                                
+                    </span>
+                </a>
+            </li>
+                </ul>
+</nav>
+</header>
+
+    <main class="phpdocumentor">
+        <div class="phpdocumentor-section">
+            <input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
+<label class="phpdocumentor-sidebar__menu-icon" for="sidebar-button">
+    Menu
+</label>
+<aside class="phpdocumentor-column -three phpdocumentor-sidebar">
+                    <section class="phpdocumentor-sidebar__category -documentation">
+            <h2 class="phpdocumentor-sidebar__category-header">Documentation</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/overview/index.html#overview" class="">Overview</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/usage/requirements.html#requirements" class="">Requirements</a>
+                
+            </li>
+                    <li>
+                <a href="guides/usage/installation.html#installation" class="">Installation</a>
+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -namespaces">
+            <h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="namespaces/occ-basics.html" class="">Basics</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="packages/Basics.html" class="">Basics</a>
+</h4>
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+                    <li>
+                <a href="packages/Basics-DataStructures.html" class="">DataStructures</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-ErrorHandlers.html" class="">ErrorHandlers</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-Interfaces.html" class="">Interfaces</a>
+                
+            </li>
+                    <li>
+                <a href="packages/Basics-Traits.html" class="">Traits</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="interface-traits">
+    <h1>Interface Traits</h1>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
+        <div class="contents"><ul class="phpdocumentor-list"><li class="toc-item"><a href="guides/overview/interfaces.html#arrayaccesstrait">ArrayAccessTrait</a></li><li class="toc-item"><a href="guides/overview/interfaces.html#countabletrait">CountableTrait</a></li><li class="toc-item"><a href="guides/overview/interfaces.html#iteratoraggregatetrait">IteratorAggregateTrait</a></li><li class="toc-item"><a href="guides/overview/interfaces.html#iteratortrait">IteratorTrait</a></li></ul></div>
+    </div>
+</div>
+
+            <div class="section" id="arrayaccesstrait">
+    <h2>ArrayAccessTrait</h2>
+
+            <p>A generic implementation of the ArrayAccess interface.</p>
+            <p>Internally it accesses the protected <code>$_data</code> array.</p>
+    </div>
+
+            <div class="section" id="countabletrait">
+    <h2>CountableTrait</h2>
+
+            <p>A generic implementation of the Countable interface.</p>
+            <p>Internally it counts the values of the protected <code>$_data</code> array.</p>
+    </div>
+
+            <div class="section" id="iteratoraggregatetrait">
+    <h2>IteratorAggregateTrait</h2>
+
+            <p>A generic implementation of the IteratorAggregate interface.</p>
+            <p>Internally it iterates over the protected <code>$_data</code> array.</p>
+    </div>
+
+            <div class="section" id="iteratortrait">
+    <h2>IteratorTrait</h2>
+
+            <p>A generic implementation of the Iterator interface.</p>
+            <p>Internally it iterates over the protected <code>$_data</code> array.</p>
+    </div>
+
+    </div>
+
+                            </div>
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diff --git a/doc/guides/overview/traits.html b/doc/guides/overview/traits.html
new file mode 100644
index 0000000..0d1e5d8
--- /dev/null
+++ b/doc/guides/overview/traits.html
@@ -0,0 +1,272 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8">
+            <title>PHP Basics</title>
+    
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+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
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+                
+            </li>
+            </ul>
+
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="guides/changelog.html#changelog" class="">Changelog</a>
+</h4>
+
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+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
+    <a href="namespaces/occ.html" class="">OCC</a>
+</h4>
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+                    <li>
+                <a href="namespaces/occ-basics.html" class="">Basics</a>
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+
+                        </section>
+                <section class="phpdocumentor-sidebar__category -packages">
+            <h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
+                                    <h4 class="phpdocumentor-sidebar__root-namespace">
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+                
+            </li>
+                    <li>
+                <a href="packages/Basics-Traits.html" class="">Traits</a>
+                
+            </li>
+            </ul>
+
+                        </section>
+            
+    <section class="phpdocumentor-sidebar__category -reports">
+        <h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
+                <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
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+        <h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
+    </section>
+
+    <section class="phpdocumentor-sidebar__category -indices">
+        <h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
+        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
+    </section>
+</aside>
+
+            <div class="phpdocumentor-column -nine phpdocumentor-content">
+                                        <div class="section" id="traits">
+    <h1>Traits</h1>
+
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
+        <div class="contents"><ul class="phpdocumentor-list"><li class="toc-item"><a href="guides/overview/traits.html#getter">Getter</a></li><li class="toc-item"><a href="guides/overview/traits.html#overloadinggetter">OverloadingGetter</a></li><li class="toc-item"><a href="guides/overview/traits.html#overloadingsetter">OverloadingSetter</a></li><li class="toc-item"><a href="guides/overview/traits.html#setter">Setter</a></li><li class="toc-item"><a href="guides/overview/traits.html#singleton">Singleton</a></li><li class="toc-item"><a href="guides/overview/traits.html#typechecker">TypeChecker</a></li></ul></div>
+    </div>
+</div>
+
+            <div class="section" id="getter">
+    <h2>Getter</h2>
+
+            <p>Reads data from inaccessible properties by using magic methods.</p>
+            <p>To make a <code>protected</code> or <code>private</code> property readable, provide a method named
+<code>_magicGet{Property}()</code> which handles the reading. Replace <code>{Property}</code> in
+the method&#039;s name with the name of the actual property (with an uppercase
+first letter).</p>
+            <p>&gt; Example: If the property is named <code>$fooBar</code>, the &quot;magic&quot; method has to be
+&gt; <code>_magicGetFooBar()</code>. This method is then called when <code>$fooBar</code> is read in
+&gt; a context where it normally would not be accessible.</p>
+    </div>
+
+            <div class="section" id="overloadinggetter">
+    <h2>OverloadingGetter</h2>
+
+            <p>Overloads a class with readable magic properties.</p>
+            <p>Internally it reads the protected <code>$_data</code> array whose keys are interpreted
+as property names.</p>
+            <p>&gt; Example: Reading <code>Foo-&gt;bar</code> will return the value of <code>$_data[&#039;bar&#039;]</code>.</p>
+    </div>
+
+            <div class="section" id="overloadingsetter">
+    <h2>OverloadingSetter</h2>
+
+            <p>Overloads a class with writable magic properties.</p>
+            <p>Internally it writes the protected <code>$_data</code> array whose keys are interpreted
+as property names.</p>
+            <p>&gt; Example: <code>Foo-&gt;bar = 42;</code> will set <code>$_data[&#039;bar&#039;]</code> to <code>42</code>.</p>
+    </div>
+
+            <div class="section" id="setter">
+    <h2>Setter</h2>
+
+            <p>Writes data to inaccessible properties by using magic methods.</p>
+            <p>To make a <code>protected</code> or <code>private</code> property writable, provide a method named
+<code>_magicSet{Property}()</code> which handles the writing. Replace <code>{Property}</code> in
+the method&#039;s name with the name of the actual property (with an uppercase
+first letter).</p>
+            <p>&gt; Example: If the property is named <code>$fooBar</code>, the &quot;magic&quot; method has to be
+&gt; <code>_magicSetFooBar()</code>. This method is then called when <code>$fooBar</code> is written
+&gt; to in a context where it normally would not be accessible.</p>
+    </div>
+
+            <div class="section" id="singleton">
+    <h2>Singleton</h2>
+
+            <p>Allows just a single instance of the class using this trait.</p>
+            <p>Get the singleton by calling the static method <code>getInstance()</code>.</p>
+            <p>If there is no object yet, the constructor is called with the same arguments
+as <code>getInstance()</code>. Any later call will just return the already instantiated
+object (irrespective of the given arguments).</p>
+            <p>In order for this to work as expected, the constructor has to be implemented
+as <code>private</code> to prevent direct instantiation of the class.</p>
+    </div>
+
+            <div class="section" id="typechecker">
+    <h2>TypeChecker</h2>
+
+            <p>A generic data type checker.</p>
+            <p>This allows to set a list of allowed atomic data types and fully qualified
+class names. It also provides a method to check if a value&#039;s data type matches
+at least one of these types.</p>
+    </div>
+
+    </div>
+
+                            </div>
+            <section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
+    <section class="phpdocumentor-search-results__dialog">
+        <header class="phpdocumentor-search-results__header">
+            <h2 class="phpdocumentor-search-results__title">Search results</h2>
+            <button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
+        </header>
+        <section class="phpdocumentor-search-results__body">
+            <ul class="phpdocumentor-search-results__entries"></ul>
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+    </section>
+</section>
+        </div>
+        <a href="guides/overview/traits.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
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+</body>
+</html>
diff --git a/doc/guides/usage/index.html b/doc/guides/usage/index.html
index f101f71..5f31f4a 100644
--- a/doc/guides/usage/index.html
+++ b/doc/guides/usage/index.html
@@ -77,6 +77,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -153,6 +171,10 @@
                                         <div class="section" id="user-guide">
     <h1>User Guide</h1>
 
+            <p>The <em>PHP Basics</em> are a library package, not a stand-alone application. The following documentation of requirements and
+installation procedures describes how to make use of the classes and traits within your own application. For a detailed
+description of the package&#039;s contents have a look at the <a href="guides/overview/index.html">Overview</a>
+ page.</p>
             <div class="toc">
     <ul class="phpdocumentor-list">
     <li class="toc-item"><a href="guides/usage/requirements.html#requirements">Requirements</a>        <ul class="section-level-1">
diff --git a/doc/guides/usage/installation.html b/doc/guides/usage/installation.html
index 76c321e..4fc5493 100644
--- a/doc/guides/usage/installation.html
+++ b/doc/guides/usage/installation.html
@@ -77,6 +77,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -153,6 +171,12 @@
                                         <div class="section" id="installation">
     <h1>Installation</h1>
 
+            <div class="admonition-wrapper">
+    <div class="admonition admonition-sidebar"><p class="sidebar-title">Table of Contents</p>
+        <div class="contents"><ul class="phpdocumentor-list"><li class="toc-item"><a href="guides/usage/installation.html#composer">Composer</a></li><li class="toc-item"><a href="guides/usage/installation.html#git">Git</a></li><li class="toc-item"><a href="guides/usage/installation.html#download">Download</a></li></ul></div>
+    </div>
+</div>
+
             <div class="section" id="composer">
     <h2>Composer</h2>
 
diff --git a/doc/guides/usage/requirements.html b/doc/guides/usage/requirements.html
index b084828..1b6d14f 100644
--- a/doc/guides/usage/requirements.html
+++ b/doc/guides/usage/requirements.html
@@ -77,6 +77,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/index.html b/doc/index.html
index 16568bb..ac56e13 100644
--- a/doc/index.html
+++ b/doc/index.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -158,10 +176,10 @@
 
     <p class="phpdocumentor-summary">A collection of generic classes and useful traits for PHP projects.</p>
 
-    <p>The package currently contains classes for <a href="packages/Basics-DataStructures.html">type-sensitive
-    data structures</a>, <a href="packages/Basics-ErrorHandlers.html">error and exception handlers</a>, multiple
-    <a href="packages/Basics-Interfaces.html">traits implementing standard interfaces</a>, and more generic
-    <a href="packages/Basics-Traits.html">traits for common use cases</a>. They share the same design principles
+    <p>The package currently contains classes for <a href="guides/overview/datastructures.html">type-sensitive
+    data structures</a>, <a href="guides/overview/errorhandlers.html">error and exception handlers</a>, multiple
+    <a href="guides/overview/interfaces.html">traits implementing standard interfaces</a>, and more generic
+    <a href="guides/overview/traits.html">traits for common use cases</a>. They share the same design principles
     like property and method naming schema, highest coding standards of <a href="https://phpstan.org/">PHPStan</a>
     and <a href="https://psalm.dev/">Psalm</a>, and full <a href="https://www.php-fig.org/psr/psr-12/">PSR-12</a>
     compliance to make sure they can be combined and easily re-used in other projects.</p>
@@ -173,6 +191,12 @@
                     <dt class="phpdocumentor-table-of-contents__entry -documentation">
                 <a href="guides/overview/index.html#overview">Overview</a>
             </dt>
+                        <dd>
+                            <a href="guides/overview/datastructures.html#typed-datastructures">Typed Datastructures</a><br/>
+                            <a href="guides/overview/errorhandlers.html#error-and-exception-handlers">Error and Exception Handlers</a><br/>
+                            <a href="guides/overview/interfaces.html#interface-traits">Interface Traits</a><br/>
+                            <a href="guides/overview/traits.html#traits">Traits</a><br/>
+                        </dd>
                                 <dt class="phpdocumentor-table-of-contents__entry -documentation">
                 <a href="guides/usage/index.html#user-guide">User Guide</a>
             </dt>
diff --git a/doc/indices/files.html b/doc/indices/files.html
index 3fb0b07..399205c 100644
--- a/doc/indices/files.html
+++ b/doc/indices/files.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -166,6 +184,7 @@
                         </ul>
                                                                                         <h3>I</h3>
             <ul class="phpdocumentor-list">
+                            <li><a href="files/src-datastructures-exceptions-invaliddatatypeexception.html"><abbr title="src/DataStructures/Exceptions/InvalidDataTypeException.php">InvalidDataTypeException.php</abbr></a></li>
                             <li><a href="files/src-interfaces-iteratoraggregatetrait.html"><abbr title="src/Interfaces/IteratorAggregateTrait.php">IteratorAggregateTrait.php</abbr></a></li>
                             <li><a href="files/src-interfaces-iteratortrait.html"><abbr title="src/Interfaces/IteratorTrait.php">IteratorTrait.php</abbr></a></li>
                         </ul>
@@ -181,12 +200,14 @@
                             <li><a href="files/src-datastructures-strictcollection.html"><abbr title="src/DataStructures/StrictCollection.php">StrictCollection.php</abbr></a></li>
                             <li><a href="files/src-datastructures-strictlist.html"><abbr title="src/DataStructures/StrictList.php">StrictList.php</abbr></a></li>
                             <li><a href="files/src-datastructures-strictqueue.html"><abbr title="src/DataStructures/StrictQueue.php">StrictQueue.php</abbr></a></li>
+                            <li><a href="files/src-datastructures-traits-strictspldatastructuretrait.html"><abbr title="src/DataStructures/Traits/StrictSplDatastructureTrait.php">StrictSplDatastructureTrait.php</abbr></a></li>
                             <li><a href="files/src-datastructures-strictstack.html"><abbr title="src/DataStructures/StrictStack.php">StrictStack.php</abbr></a></li>
                         </ul>
                                                         <h3>T</h3>
             <ul class="phpdocumentor-list">
                             <li><a href="files/src-errorhandlers-throwerrorexception.html"><abbr title="src/ErrorHandlers/ThrowErrorException.php">ThrowErrorException.php</abbr></a></li>
                             <li><a href="files/src-errorhandlers-triggerexceptionerror.html"><abbr title="src/ErrorHandlers/TriggerExceptionError.php">TriggerExceptionError.php</abbr></a></li>
+                            <li><a href="files/src-traits-typechecker.html"><abbr title="src/Traits/TypeChecker.php">TypeChecker.php</abbr></a></li>
                         </ul>
                                                                                                                                                                                                                         </section>
                             </div>
diff --git a/doc/js/searchIndex.js b/doc/js/searchIndex.js
index 7f20207..0e06f03 100644
--- a/doc/js/searchIndex.js
+++ b/doc/js/searchIndex.js
@@ -1,6 +1,11 @@
 Search.appendIndex(
     [
                 {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Exceptions\\InvalidDataTypeException",
+            "name": "InvalidDataTypeException",
+            "summary": "Common\u0020exception\u0020for\u0020type\u002Dsensitive\u0020datastructures.",
+            "url": "classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"
+        },                {
             "fqsen": "\\OCC\\Basics\\DataStructures\\StrictCollection",
             "name": "StrictCollection",
             "summary": "A\u0020type\u002Dsensitive,\u0020unsorted\u0020collection.",
@@ -8,7 +13,7 @@ Search.appendIndex(
         },                {
             "fqsen": "\\OCC\\Basics\\DataStructures\\StrictCollection\u003A\u003Aadd\u0028\u0029",
             "name": "add",
-            "summary": "Add\/insert\u0020a\u0020new\u0020item\u0020at\u0020the\u0020specified\u0020index.",
+            "summary": "Add\/insert\u0020a\u0020item\u0020at\u0020the\u0020specified\u0020index.",
             "url": "classes/OCC-Basics-DataStructures-StrictCollection.html#method_add"
         },                {
             "fqsen": "\\OCC\\Basics\\DataStructures\\StrictCollection\u003A\u003Aclear\u0028\u0029",
@@ -20,16 +25,6 @@ Search.appendIndex(
             "name": "get",
             "summary": "Get\u0020the\u0020item\u0020at\u0020the\u0020specified\u0020index.",
             "url": "classes/OCC-Basics-DataStructures-StrictCollection.html#method_get"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictCollection\u003A\u003AgetAllowedTypes\u0028\u0029",
-            "name": "getAllowedTypes",
-            "summary": "Get\u0020allowed\u0020data\u0020types\u0020for\u0020collection\u0020items.",
-            "url": "classes/OCC-Basics-DataStructures-StrictCollection.html#method_getAllowedTypes"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictCollection\u003A\u003AisAllowedType\u0028\u0029",
-            "name": "isAllowedType",
-            "summary": "Check\u0020if\u0020the\u0020item\u0027s\u0020data\u0020type\u0020is\u0020allowed\u0020in\u0020the\u0020collection.",
-            "url": "classes/OCC-Basics-DataStructures-StrictCollection.html#method_isAllowedType"
         },                {
             "fqsen": "\\OCC\\Basics\\DataStructures\\StrictCollection\u003A\u003AisEmpty\u0028\u0029",
             "name": "isEmpty",
@@ -60,11 +55,6 @@ Search.appendIndex(
             "name": "set",
             "summary": "Set\u0020an\u0020item\u0020at\u0020the\u0020specified\u0020index.",
             "url": "classes/OCC-Basics-DataStructures-StrictCollection.html#method_set"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictCollection\u003A\u003AsetAllowedTypes\u0028\u0029",
-            "name": "setAllowedTypes",
-            "summary": "Set\u0020allowed\u0020data\u0020types\u0020of\u0020collection\u0020items.",
-            "url": "classes/OCC-Basics-DataStructures-StrictCollection.html#method_setAllowedTypes"
         },                {
             "fqsen": "\\OCC\\Basics\\DataStructures\\StrictCollection\u003A\u003AtoArray\u0028\u0029",
             "name": "toArray",
@@ -90,201 +80,16 @@ Search.appendIndex(
             "name": "StrictList",
             "summary": "A\u0020type\u002Dsensitive,\u0020taversable\u0020list.",
             "url": "classes/OCC-Basics-DataStructures-StrictList.html"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Aadd\u0028\u0029",
-            "name": "add",
-            "summary": "Add\/insert\u0020a\u0020new\u0020item\u0020at\u0020the\u0020specified\u0020offset.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_add"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Aappend\u0028\u0029",
-            "name": "append",
-            "summary": "Append\u0020items\u0020at\u0020the\u0020end\u0020of\u0020the\u0020list.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_append"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Abottom\u0028\u0029",
-            "name": "bottom",
-            "summary": "Peek\u0020at\u0020the\u0020item\u0020at\u0020the\u0020beginning\u0020of\u0020the\u0020list.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_bottom"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Aclear\u0028\u0029",
-            "name": "clear",
-            "summary": "Clear\u0020the\u0020list\u0020of\u0020any\u0020items.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_clear"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Acount\u0028\u0029",
-            "name": "count",
-            "summary": "Get\u0020the\u0020number\u0020of\u0020items\u0020on\u0020the\u0020list.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_count"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Acurrent\u0028\u0029",
-            "name": "current",
-            "summary": "Get\u0020the\u0020current\u0020list\u0020item.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_current"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Aget\u0028\u0029",
-            "name": "get",
-            "summary": "Get\u0020the\u0020item\u0020at\u0020the\u0020specified\u0020index.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_get"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AgetAllowedTypes\u0028\u0029",
-            "name": "getAllowedTypes",
-            "summary": "Get\u0020allowed\u0020data\u0020types\u0020for\u0020list\u0020items.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_getAllowedTypes"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AgetIteratorMode\u0028\u0029",
-            "name": "getIteratorMode",
-            "summary": "Get\u0020the\u0020mode\u0020of\u0020iteration.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_getIteratorMode"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AisAllowedType\u0028\u0029",
-            "name": "isAllowedType",
-            "summary": "Check\u0020if\u0020the\u0020item\u0027s\u0020data\u0020type\u0020is\u0020allowed\u0020on\u0020the\u0020list.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_isAllowedType"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AisEmpty\u0028\u0029",
-            "name": "isEmpty",
-            "summary": "Check\u0020if\u0020list\u0020is\u0020empty.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_isEmpty"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AisList\u0028\u0029",
-            "name": "isList",
-            "summary": "Check\u0020if\u0020this\u0020can\u0020be\u0020considered\u0020a\u0020list.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_isList"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Akey\u0028\u0029",
-            "name": "key",
-            "summary": "Get\u0020the\u0020current\u0020list\u0020index.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_key"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Anext\u0028\u0029",
-            "name": "next",
-            "summary": "Move\u0020the\u0020cursor\u0020to\u0020the\u0020next\u0020list\u0020index.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_next"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AoffsetExists\u0028\u0029",
-            "name": "offsetExists",
-            "summary": "Check\u0020if\u0020the\u0020specified\u0020index\u0020exists\u0020and\u0020is\u0020not\u0020empty.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_offsetExists"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AoffsetGet\u0028\u0029",
-            "name": "offsetGet",
-            "summary": "Get\u0020the\u0020item\u0020from\u0020the\u0020specified\u0020index.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_offsetGet"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AoffsetSet\u0028\u0029",
-            "name": "offsetSet",
-            "summary": "Set\u0020the\u0020item\u0020at\u0020the\u0020specified\u0020offset.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_offsetSet"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AoffsetUnset\u0028\u0029",
-            "name": "offsetUnset",
-            "summary": "Unset\u0020the\u0020item\u0020at\u0020the\u0020specified\u0020index.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_offsetUnset"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Apop\u0028\u0029",
-            "name": "pop",
-            "summary": "Pops\u0020an\u0020item\u0020from\u0020the\u0020end\u0020of\u0020the\u0020list.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_pop"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Aprepend\u0028\u0029",
-            "name": "prepend",
-            "summary": "Prepend\u0020items\u0020at\u0020the\u0020start\u0020of\u0020the\u0020list.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_prepend"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Aprev\u0028\u0029",
-            "name": "prev",
-            "summary": "Move\u0020the\u0020cursor\u0020to\u0020the\u0020previous\u0020list\u0020index.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_prev"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Apush\u0028\u0029",
-            "name": "push",
-            "summary": "Push\u0020an\u0020item\u0020at\u0020the\u0020end\u0020of\u0020the\u0020list.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_push"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Aremove\u0028\u0029",
-            "name": "remove",
-            "summary": "Remove\u0020an\u0020item\u0020from\u0020the\u0020list.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_remove"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Arewind\u0028\u0029",
-            "name": "rewind",
-            "summary": "Rewind\u0020the\u0020iterator\u0027s\u0020cursor.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_rewind"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Aset\u0028\u0029",
-            "name": "set",
-            "summary": "Set\u0020an\u0020item\u0020at\u0020the\u0020specified\u0020index.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_set"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AsetAllowedTypes\u0028\u0029",
-            "name": "setAllowedTypes",
-            "summary": "Set\u0020allowed\u0020data\u0020types\u0020of\u0020list\u0020items.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_setAllowedTypes"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AsetIteratorMode\u0028\u0029",
-            "name": "setIteratorMode",
-            "summary": "Set\u0020the\u0020mode\u0020of\u0020iteration.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_setIteratorMode"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Ashift\u0028\u0029",
-            "name": "shift",
-            "summary": "Shift\u0020an\u0020item\u0020from\u0020the\u0020beginning\u0020of\u0020the\u0020list.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_shift"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AtoArray\u0028\u0029",
-            "name": "toArray",
-            "summary": "Return\u0020array\u0020representation\u0020of\u0020list.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_toArray"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003AtoStrictCollection\u0028\u0029",
-            "name": "toStrictCollection",
-            "summary": "Turn\u0020list\u0020into\u0020a\u0020type\u002Dsensitive\u0020collection.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_toStrictCollection"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Atop\u0028\u0029",
-            "name": "top",
-            "summary": "Peek\u0020at\u0020the\u0020item\u0020at\u0020the\u0020end\u0020of\u0020the\u0020list.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_top"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Aunshift\u0028\u0029",
-            "name": "unshift",
-            "summary": "Prepend\u0020the\u0020list\u0020with\u0020an\u0020item.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_unshift"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003Avalid\u0028\u0029",
-            "name": "valid",
-            "summary": "Check\u0020if\u0020current\u0020cursor\u0020position\u0020is\u0020valid.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method_valid"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictList\u003A\u003A__construct\u0028\u0029",
-            "name": "__construct",
-            "summary": "Create\u0020a\u0020type\u002Dsensitive,\u0020traversable\u0020list\u0020of\u0020items.",
-            "url": "classes/OCC-Basics-DataStructures-StrictList.html#method___construct"
         },                {
             "fqsen": "\\OCC\\Basics\\DataStructures\\StrictQueue",
             "name": "StrictQueue",
             "summary": "A\u0020type\u002Dsensitive,\u0020taversable\u0020queue\u0020\u0028FIFO\u0029.",
             "url": "classes/OCC-Basics-DataStructures-StrictQueue.html"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictQueue\u003A\u003Adequeue\u0028\u0029",
-            "name": "dequeue",
-            "summary": "Dequeue\u0020an\u0020item\u0020from\u0020the\u0020queue.",
-            "url": "classes/OCC-Basics-DataStructures-StrictQueue.html#method_dequeue"
         },                {
             "fqsen": "\\OCC\\Basics\\DataStructures\\StrictQueue\u003A\u003Aenqueue\u0028\u0029",
             "name": "enqueue",
             "summary": "Add\u0020an\u0020item\u0020to\u0020the\u0020queue.",
             "url": "classes/OCC-Basics-DataStructures-StrictQueue.html#method_enqueue"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictQueue\u003A\u003AsetIteratorMode\u0028\u0029",
-            "name": "setIteratorMode",
-            "summary": "Set\u0020the\u0020mode\u0020of\u0020iteration.",
-            "url": "classes/OCC-Basics-DataStructures-StrictQueue.html#method_setIteratorMode"
-        },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictQueue\u003A\u003A__construct\u0028\u0029",
-            "name": "__construct",
-            "summary": "Create\u0020a\u0020type\u002Dsensitive,\u0020traversable\u0020queue\u0020of\u0020items.",
-            "url": "classes/OCC-Basics-DataStructures-StrictQueue.html#method___construct"
         },                {
             "fqsen": "\\OCC\\Basics\\DataStructures\\StrictStack",
             "name": "StrictStack",
@@ -301,15 +106,80 @@ Search.appendIndex(
             "summary": "Unstack\u0020an\u0020item\u0020from\u0020the\u0020stack.",
             "url": "classes/OCC-Basics-DataStructures-StrictStack.html#method_unstack"
         },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictStack\u003A\u003AsetIteratorMode\u0028\u0029",
-            "name": "setIteratorMode",
-            "summary": "Set\u0020the\u0020mode\u0020of\u0020iteration.",
-            "url": "classes/OCC-Basics-DataStructures-StrictStack.html#method_setIteratorMode"
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait",
+            "name": "StrictSplDatastructureTrait",
+            "summary": "The\u0020common\u0020interface\u0020of\u0020all\u0020type\u002Dsensitive,\u0020SPL\u002Dbased\u0020datastructures.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html"
         },                {
-            "fqsen": "\\OCC\\Basics\\DataStructures\\StrictStack\u003A\u003A__construct\u0028\u0029",
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003Aadd\u0028\u0029",
+            "name": "add",
+            "summary": "Add\/insert\u0020a\u0020new\u0020item\u0020at\u0020the\u0020specified\u0020offset.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_add"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003Aappend\u0028\u0029",
+            "name": "append",
+            "summary": "Append\u0020items\u0020at\u0020the\u0020end\u0020of\u0020the\u0020list.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_append"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003Aclear\u0028\u0029",
+            "name": "clear",
+            "summary": "Clear\u0020the\u0020list\u0020of\u0020any\u0020items.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_clear"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003Aget\u0028\u0029",
+            "name": "get",
+            "summary": "Get\u0020the\u0020item\u0020at\u0020the\u0020specified\u0020index.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_get"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003AisList\u0028\u0029",
+            "name": "isList",
+            "summary": "Check\u0020if\u0020this\u0020can\u0020be\u0020considered\u0020a\u0020list.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_isList"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003AoffsetSet\u0028\u0029",
+            "name": "offsetSet",
+            "summary": "Set\u0020the\u0020item\u0020at\u0020the\u0020specified\u0020offset.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_offsetSet"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003Aprepend\u0028\u0029",
+            "name": "prepend",
+            "summary": "Prepend\u0020items\u0020at\u0020the\u0020start\u0020of\u0020the\u0020list.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_prepend"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003Apush\u0028\u0029",
+            "name": "push",
+            "summary": "Push\u0020an\u0020item\u0020at\u0020the\u0020end\u0020of\u0020the\u0020list.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_push"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003Aremove\u0028\u0029",
+            "name": "remove",
+            "summary": "Remove\u0020an\u0020item\u0020from\u0020the\u0020list.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_remove"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003Aset\u0028\u0029",
+            "name": "set",
+            "summary": "Set\u0020an\u0020item\u0020at\u0020the\u0020specified\u0020index.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_set"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003AtoArray\u0028\u0029",
+            "name": "toArray",
+            "summary": "Return\u0020array\u0020representation\u0020of\u0020list.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toArray"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003AtoStrictCollection\u0028\u0029",
+            "name": "toStrictCollection",
+            "summary": "Turn\u0020list\u0020into\u0020a\u0020type\u002Dsensitive\u0020collection.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_toStrictCollection"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003Aunshift\u0028\u0029",
+            "name": "unshift",
+            "summary": "Prepend\u0020the\u0020list\u0020with\u0020an\u0020item.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method_unshift"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits\\StrictSplDatastructureTrait\u003A\u003A__construct\u0028\u0029",
             "name": "__construct",
-            "summary": "Create\u0020a\u0020type\u002Dsensitive,\u0020traversable\u0020stack\u0020of\u0020items.",
-            "url": "classes/OCC-Basics-DataStructures-StrictStack.html#method___construct"
+            "summary": "Create\u0020a\u0020type\u002Dsensitive,\u0020traversable\u0020list\u0020of\u0020items.",
+            "url": "classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html#method___construct"
         },                {
             "fqsen": "\\OCC\\Basics\\ErrorHandlers\\ThrowErrorException",
             "name": "ThrowErrorException",
@@ -490,11 +360,41 @@ Search.appendIndex(
             "name": "__clone",
             "summary": "This\u0020is\u0020a\u0020singleton\u0020class,\u0020thus\u0020cloning\u0020is\u0020prohibited.",
             "url": "classes/OCC-Basics-Traits-Singleton.html#method___clone"
+        },                {
+            "fqsen": "\\OCC\\Basics\\Traits\\TypeChecker",
+            "name": "TypeChecker",
+            "summary": "A\u0020generic\u0020data\u0020type\u0020checker.",
+            "url": "classes/OCC-Basics-Traits-TypeChecker.html"
+        },                {
+            "fqsen": "\\OCC\\Basics\\Traits\\TypeChecker\u003A\u003AgetAllowedTypes\u0028\u0029",
+            "name": "getAllowedTypes",
+            "summary": "Get\u0020allowed\u0020data\u0020types.",
+            "url": "classes/OCC-Basics-Traits-TypeChecker.html#method_getAllowedTypes"
+        },                {
+            "fqsen": "\\OCC\\Basics\\Traits\\TypeChecker\u003A\u003AhasAllowedType\u0028\u0029",
+            "name": "hasAllowedType",
+            "summary": "Check\u0020if\u0020a\u0020value\u0027s\u0020data\u0020type\u0020is\u0020allowed.",
+            "url": "classes/OCC-Basics-Traits-TypeChecker.html#method_hasAllowedType"
+        },                {
+            "fqsen": "\\OCC\\Basics\\Traits\\TypeChecker\u003A\u003AisAllowedType\u0028\u0029",
+            "name": "isAllowedType",
+            "summary": "Check\u0020if\u0020a\u0020data\u0020type\u0020is\u0020allowed.",
+            "url": "classes/OCC-Basics-Traits-TypeChecker.html#method_isAllowedType"
+        },                {
+            "fqsen": "\\OCC\\Basics\\Traits\\TypeChecker\u003A\u003AsetAllowedTypes\u0028\u0029",
+            "name": "setAllowedTypes",
+            "summary": "Set\u0020allowed\u0020data\u0020types.",
+            "url": "classes/OCC-Basics-Traits-TypeChecker.html#method_setAllowedTypes"
         },                {
             "fqsen": "\\",
             "name": "\\",
             "summary": "",
             "url": "namespaces/default.html"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Exceptions",
+            "name": "Exceptions",
+            "summary": "",
+            "url": "namespaces/occ-basics-datastructures-exceptions.html"
         },                {
             "fqsen": "\\OCC\\Basics\\DataStructures",
             "name": "DataStructures",
@@ -510,6 +410,11 @@ Search.appendIndex(
             "name": "OCC",
             "summary": "",
             "url": "namespaces/occ.html"
+        },                {
+            "fqsen": "\\OCC\\Basics\\DataStructures\\Traits",
+            "name": "Traits",
+            "summary": "",
+            "url": "namespaces/occ-basics-datastructures-traits.html"
         },                {
             "fqsen": "\\OCC\\Basics\\ErrorHandlers",
             "name": "ErrorHandlers",
diff --git a/doc/namespaces/default.html b/doc/namespaces/default.html
index 7e1c2ad..d70e504 100644
--- a/doc/namespaces/default.html
+++ b/doc/namespaces/default.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/namespaces/occ-basics-datastructures-exceptions.html b/doc/namespaces/occ-basics-datastructures-exceptions.html
new file mode 100644
index 0000000..2fc5cb5
--- /dev/null
+++ b/doc/namespaces/occ-basics-datastructures-exceptions.html
@@ -0,0 +1,345 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
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+            <title>PHP Basics</title>
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diff --git a/doc/namespaces/occ-basics-datastructures.html b/doc/namespaces/occ-basics-datastructures.html
index 07c5e8f..dd0634e 100644
--- a/doc/namespaces/occ-basics-datastructures.html
+++ b/doc/namespaces/occ-basics-datastructures.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -166,6 +184,15 @@
 </h3>
 
 
+<h4 id="namespaces">
+    Namespaces
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+<dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -namespace"><a href="namespaces/occ-basics-datastructures-exceptions.html"><abbr title="\OCC\Basics\DataStructures\Exceptions">Exceptions</abbr></a></dt>
+            <dt class="phpdocumentor-table-of-contents__entry -namespace"><a href="namespaces/occ-basics-datastructures-traits.html"><abbr title="\OCC\Basics\DataStructures\Traits">Traits</abbr></a></dt>
+    </dl>
 
 
     <h4 id="toc-classes">
diff --git a/doc/namespaces/occ-basics-errorhandlers.html b/doc/namespaces/occ-basics-errorhandlers.html
index dca3451..21e6429 100644
--- a/doc/namespaces/occ-basics-errorhandlers.html
+++ b/doc/namespaces/occ-basics-errorhandlers.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
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     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/namespaces/occ-basics-interfaces.html b/doc/namespaces/occ-basics-interfaces.html
index 16acbf2..9df6480 100644
--- a/doc/namespaces/occ-basics-interfaces.html
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@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
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+                
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+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
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+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
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     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/namespaces/occ-basics-traits.html b/doc/namespaces/occ-basics-traits.html
index e15f93a..648c223 100644
--- a/doc/namespaces/occ-basics-traits.html
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@@ -76,6 +76,24 @@
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+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
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+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -175,7 +193,7 @@
 
     </h4>
     <dl class="phpdocumentor-table-of-contents">
-            <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-Getter.html"><abbr title="\OCC\Basics\Traits\Getter">Getter</abbr></a></dt><dd>Reads data from inaccessible properties by using magic methods.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-OverloadingGetter.html"><abbr title="\OCC\Basics\Traits\OverloadingGetter">OverloadingGetter</abbr></a></dt><dd>Overloads a class with readable magic properties.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-OverloadingSetter.html"><abbr title="\OCC\Basics\Traits\OverloadingSetter">OverloadingSetter</abbr></a></dt><dd>Overloads a class with writable magic properties.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-Setter.html"><abbr title="\OCC\Basics\Traits\Setter">Setter</abbr></a></dt><dd>Writes data to inaccessible properties by using magic methods.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-Singleton.html"><abbr title="\OCC\Basics\Traits\Singleton">Singleton</abbr></a></dt><dd>Allows just a single instance of the class using this trait.</dd>    </dl>
+            <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-Getter.html"><abbr title="\OCC\Basics\Traits\Getter">Getter</abbr></a></dt><dd>Reads data from inaccessible properties by using magic methods.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-OverloadingGetter.html"><abbr title="\OCC\Basics\Traits\OverloadingGetter">OverloadingGetter</abbr></a></dt><dd>Overloads a class with readable magic properties.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-OverloadingSetter.html"><abbr title="\OCC\Basics\Traits\OverloadingSetter">OverloadingSetter</abbr></a></dt><dd>Overloads a class with writable magic properties.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-Setter.html"><abbr title="\OCC\Basics\Traits\Setter">Setter</abbr></a></dt><dd>Writes data to inaccessible properties by using magic methods.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-Singleton.html"><abbr title="\OCC\Basics\Traits\Singleton">Singleton</abbr></a></dt><dd>Allows just a single instance of the class using this trait.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-TypeChecker.html"><abbr title="\OCC\Basics\Traits\TypeChecker">TypeChecker</abbr></a></dt><dd>A generic data type checker.</dd>    </dl>
 
 
 
diff --git a/doc/namespaces/occ-basics.html b/doc/namespaces/occ-basics.html
index 5694a09..00b65a6 100644
--- a/doc/namespaces/occ-basics.html
+++ b/doc/namespaces/occ-basics.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/namespaces/occ.html b/doc/namespaces/occ.html
index 9ce3c48..b791008 100644
--- a/doc/namespaces/occ.html
+++ b/doc/namespaces/occ.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/packages/Basics-DataStructures.html b/doc/packages/Basics-DataStructures.html
index 11e8cfc..bf3365e 100644
--- a/doc/packages/Basics-DataStructures.html
+++ b/doc/packages/Basics-DataStructures.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -173,8 +191,15 @@
 
     </h4>
     <dl class="phpdocumentor-table-of-contents">
-                    <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a></dt><dd>A type-sensitive, unsorted collection.</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-Basics-DataStructures-StrictList.html"><abbr title="\OCC\Basics\DataStructures\StrictList">StrictList</abbr></a></dt><dd>A type-sensitive, taversable list.</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-Basics-DataStructures-StrictQueue.html"><abbr title="\OCC\Basics\DataStructures\StrictQueue">StrictQueue</abbr></a></dt><dd>A type-sensitive, taversable queue (FIFO).</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-Basics-DataStructures-StrictStack.html"><abbr title="\OCC\Basics\DataStructures\StrictStack">StrictStack</abbr></a></dt><dd>A type-sensitive, taversable stack (LIFO).</dd>    </dl>
+                    <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-Basics-DataStructures-Exceptions-InvalidDataTypeException.html"><abbr title="\OCC\Basics\DataStructures\Exceptions\InvalidDataTypeException">InvalidDataTypeException</abbr></a></dt><dd>Common exception for type-sensitive datastructures.</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-Basics-DataStructures-StrictCollection.html"><abbr title="\OCC\Basics\DataStructures\StrictCollection">StrictCollection</abbr></a></dt><dd>A type-sensitive, unsorted collection.</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-Basics-DataStructures-StrictList.html"><abbr title="\OCC\Basics\DataStructures\StrictList">StrictList</abbr></a></dt><dd>A type-sensitive, taversable list.</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-Basics-DataStructures-StrictQueue.html"><abbr title="\OCC\Basics\DataStructures\StrictQueue">StrictQueue</abbr></a></dt><dd>A type-sensitive, taversable queue (FIFO).</dd>            <dt class="phpdocumentor-table-of-contents__entry -class"><a href="classes/OCC-Basics-DataStructures-StrictStack.html"><abbr title="\OCC\Basics\DataStructures\StrictStack">StrictStack</abbr></a></dt><dd>A type-sensitive, taversable stack (LIFO).</dd>    </dl>
 
+    <h4 id="toc-traits">
+        Traits
+        <a href="packages/Basics-DataStructures.html#toc-traits" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <dl class="phpdocumentor-table-of-contents">
+            <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-DataStructures-Traits-StrictSplDatastructureTrait.html"><abbr title="\OCC\Basics\DataStructures\Traits\StrictSplDatastructureTrait">StrictSplDatastructureTrait</abbr></a></dt><dd>The common interface of all type-sensitive, SPL-based datastructures.</dd>    </dl>
 
 
 
@@ -289,7 +314,8 @@
             <li>
                 <ul class="phpdocumentor-list -clean">
                                                                                                         <li><a href="packages/Basics-DataStructures.html#toc-classes">Classes</a></li>
-                                                                                                                    </ul>
+                                                                <li><a href="packages/Basics-DataStructures.html#toc-traits">Traits</a></li>
+                                                                                                </ul>
             </li>
 
             
diff --git a/doc/packages/Basics-ErrorHandlers.html b/doc/packages/Basics-ErrorHandlers.html
index f2c9cf4..9258cf5 100644
--- a/doc/packages/Basics-ErrorHandlers.html
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@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/packages/Basics-Interfaces.html b/doc/packages/Basics-Interfaces.html
index d27f811..d92ed72 100644
--- a/doc/packages/Basics-Interfaces.html
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@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/packages/Basics-Traits.html b/doc/packages/Basics-Traits.html
index ffb5b6d..2b259eb 100644
--- a/doc/packages/Basics-Traits.html
+++ b/doc/packages/Basics-Traits.html
@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
@@ -174,7 +192,7 @@
 
     </h4>
     <dl class="phpdocumentor-table-of-contents">
-            <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-Getter.html"><abbr title="\OCC\Basics\Traits\Getter">Getter</abbr></a></dt><dd>Reads data from inaccessible properties by using magic methods.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-OverloadingGetter.html"><abbr title="\OCC\Basics\Traits\OverloadingGetter">OverloadingGetter</abbr></a></dt><dd>Overloads a class with readable magic properties.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-OverloadingSetter.html"><abbr title="\OCC\Basics\Traits\OverloadingSetter">OverloadingSetter</abbr></a></dt><dd>Overloads a class with writable magic properties.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-Setter.html"><abbr title="\OCC\Basics\Traits\Setter">Setter</abbr></a></dt><dd>Writes data to inaccessible properties by using magic methods.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-Singleton.html"><abbr title="\OCC\Basics\Traits\Singleton">Singleton</abbr></a></dt><dd>Allows just a single instance of the class using this trait.</dd>    </dl>
+            <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-Getter.html"><abbr title="\OCC\Basics\Traits\Getter">Getter</abbr></a></dt><dd>Reads data from inaccessible properties by using magic methods.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-OverloadingGetter.html"><abbr title="\OCC\Basics\Traits\OverloadingGetter">OverloadingGetter</abbr></a></dt><dd>Overloads a class with readable magic properties.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-OverloadingSetter.html"><abbr title="\OCC\Basics\Traits\OverloadingSetter">OverloadingSetter</abbr></a></dt><dd>Overloads a class with writable magic properties.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-Setter.html"><abbr title="\OCC\Basics\Traits\Setter">Setter</abbr></a></dt><dd>Writes data to inaccessible properties by using magic methods.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-Singleton.html"><abbr title="\OCC\Basics\Traits\Singleton">Singleton</abbr></a></dt><dd>Allows just a single instance of the class using this trait.</dd>        <dt class="phpdocumentor-table-of-contents__entry -trait"><a href="classes/OCC-Basics-Traits-TypeChecker.html"><abbr title="\OCC\Basics\Traits\TypeChecker">TypeChecker</abbr></a></dt><dd>A generic data type checker.</dd>    </dl>
 
 
 
diff --git a/doc/packages/Basics.html b/doc/packages/Basics.html
index 34b853b..193741c 100644
--- a/doc/packages/Basics.html
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@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/packages/default.html b/doc/packages/default.html
index c36deb0..2b35a35 100644
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@@ -76,6 +76,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/reports/deprecated.html b/doc/reports/deprecated.html
index cd152be..ffaf0e5 100644
--- a/doc/reports/deprecated.html
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@@ -77,6 +77,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/reports/errors.html b/doc/reports/errors.html
index beef8c4..1eeda37 100644
--- a/doc/reports/errors.html
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@@ -77,6 +77,24 @@
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     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>
diff --git a/doc/reports/markers.html b/doc/reports/markers.html
index aa4fa05..0b65c24 100644
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@@ -77,6 +77,24 @@
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/overview/index.html#overview" class="">Overview</a>
 </h4>
+    <ul class="phpdocumentor-list">
+                    <li>
+                <a href="guides/overview/datastructures.html#typed-datastructures" class="">Typed Datastructures</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/errorhandlers.html#error-and-exception-handlers" class="">Error and Exception Handlers</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/interfaces.html#interface-traits" class="">Interface Traits</a>
+                
+            </li>
+                    <li>
+                <a href="guides/overview/traits.html#traits" class="">Traits</a>
+                
+            </li>
+            </ul>
 
                                     <h4 class="phpdocumentor-sidebar__root-namespace">
     <a href="guides/usage/index.html#user-guide" class="">User Guide</a>