[
  {
    "op": "core/column-addition",
    "engineConfig": {
      "facets": [],
      "mode": "row-based"
    },
    "baseColumnName": "M|542a",
    "expression": "grel:forEach(value.split('␟'), v, forNonBlank(filter(v.split('\u001f'), f, f[0] == 'a')[0].slice(1), x, '\u001f0' + x.replace('x','X'), '') + forNonBlank(filter(v.split('\u001f'), f, f[0] == 'b')[0].slice(1), x, '\u001ff' + x, '') ).join('␟')",
    "onError": "set-to-blank",
    "newColumnName": "2010",
    "columnInsertIndex": 3,
    "description": "Create column 2010"
  }
]