d2/testdata/d2ir/TestCompile/field/root.exp.json

{
  "ast": {
    "range": "TestCompile/field/root.d2,0:0:0-0:1:1",
    "nodes": [
      {
        "map_key": {
          "range": "TestCompile/field/root.d2,0:0:0-0:1:1",
          "key": {
            "range": "TestCompile/field/root.d2,0:0:0-0:1:1",
            "path": [
              {
                "unquoted_string": {
                  "range": "TestCompile/field/root.d2,0:0:0-0:1:1",
                  "value": [
                    {
                      "string": "x",
                      "raw_string": "x"
                    }
                  ]
                }
              }
            ]
          },
          "primary": {},
          "value": {}
        }
      }
    ]
  },
  "base": {
    "fields": [
      {
        "name": "x"
      }
    ],
    "edges": null
  }
}