[
  {
    "op": "core/column-addition",
    "engineConfig": {
      "facets": [],
      "mode": "row-based"
    },
    "baseColumnName": "M|519",
    "expression": "grel:'\u001fa' + value",
    "onError": "set-to-blank",
    "newColumnName": "4204",
    "columnInsertIndex": 3,
    "description": "Create column 4204 at index 3 based on column M|519 using expression grel:'\u001fa' + value"
  },
  {
    "op": "core/text-transform",
    "engineConfig": {
      "facets": [
        {
          "type": "list",
          "name": "M|520",
          "expression": "isBlank(value)",
          "columnName": "M|520",
          "invert": false,
          "omitBlank": false,
          "omitError": false,
          "selection": [
            {
              "v": {
                "v": false,
                "l": "false"
              }
            }
          ],
          "selectBlank": false,
          "selectError": false
        }
      ],
      "mode": "row-based"
    },
    "columnName": "4204",
    "expression": "grel:coalesce(forNonBlank(filter(cells['M|520'].value.split('\u001f'), f, f[0] == 'a')[0].slice(1), x, '\u001fa' + x, '') + forNonBlank(filter(cells['M|520'].value.split('\u001f'), f, f[0] == 'b')[0].slice(1), x, '\u001fd' + x, '') + forNonBlank(filter(cells['M|520'].value.split('\u001f'), f, f[0] == 'c')[0].slice(1), x, '\u001fe' + x, '') + forNonBlank(filter(cells['M|520'].value.split('\u001f'), f, f[0] == 'd')[0].slice(1), x, '\u001ff' + x, ''), value)",
    "onError": "keep-original",
    "repeat": false,
    "repeatCount": 10,
    "description": "Text transform on cells in column 4204 using expression grel:coalesce(forNonBlank(filter(cells['M|520'].value.split('\u001f'), f, f[0] == 'a')[0].slice(1), x, '\u001fa' + x, '') + forNonBlank(filter(cells['M|520'].value.split('\u001f'), f, f[0] == 'b')[0].slice(1), x, '\u001fd' + x, '') + forNonBlank(filter(cells['M|520'].value.split('\u001f'), f, f[0] == 'c')[0].slice(1), x, '\u001fe' + x, '') + forNonBlank(filter(cells['M|520'].value.split('\u001f'), f, f[0] == 'd')[0].slice(1), x, '\u001ff' + x, ''), value)"
  }
]