{
  "graph": null,
  "err": {
    "errs": [
      {
        "range": "d2/testdata/d2compiler/TestCompile/no-nested-columns-class.d2,2:4:24-2:5:25",
        "errmsg": "d2/testdata/d2compiler/TestCompile/no-nested-columns-class.d2:3:5: class fields cannot have children"
      }
    ]
  }
}