json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "definitions": {
          "localDef1": {
              "type": "object",
              "properties": {
                  "foo": {
                      "type": "string"
                  }
              }
          },
          "localDef2": {
              "type": "object",
              "properties": {
                  "bar": {
                      "type": "number"
                  }
              }
          }
      },
      "anyOf": [
          {
              "$ref": "#/definitions/localDef1"
          },
          {
              "type": "object",
              "properties": {
                  "baz": {
                      "$ref": "#/definitions/localDef2"
                  }
              }
          }
      ]
  }