{
  "graph": null,
  "err": {
    "errs": [
      {
        "range": "d2/testdata/d2compiler/TestCompile/classes-internal-edge.d2,7:2:72-7:16:86",
        "errmsg": "d2/testdata/d2compiler/TestCompile/classes-internal-edge.d2:8:3: classes cannot contain an edge"
      }
    ]
  }
}