[
  {
    "op": "core/column-addition",
    "engineConfig": {
      "facets": [],
      "mode": "row-based"
    },
    "baseColumnName": "M|540a",
    "expression": "grel:[ value, cells['M|540'].value ].join('␟')",
    "onError": "set-to-blank",
    "newColumnName": "2000",
    "columnInsertIndex": 3,
    "description": "Create column 2000 at index 3 based on column M|540a using expression grel:[ value, cells['M|540'].value ].join('␟')"
  },
  {
    "op": "core/text-transform",
    "engineConfig": {
      "facets": [
        {
          "type": "list",
          "name": "2000",
          "expression": "isBlank(value)",
          "columnName": "2000",
          "invert": false,
          "omitBlank": false,
          "omitError": false,
          "selection": [
            {
              "v": {
                "v": false,
                "l": "false"
              }
            }
          ],
          "selectBlank": false,
          "selectError": false
        }
      ],
      "mode": "row-based"
    },
    "columnName": "2000",
    "expression": "grel:forEach(value.split('␟'), v, forNonBlank(filter(v.split('\u001f'), f, f[0] == 'a')[0].slice(1), x, '\u001f0' + x.replace('-','').replace('x','X'), '') + forNonBlank(filter(v.split('\u001f'), f, f[0] == 'b')[0].slice(1), x, '\u001ff' + x, '') ).join('␟')",
    "onError": "keep-original",
    "repeat": false,
    "repeatCount": 10,
    "description": "Text transform on cells in column 2000"
  }
]