json_schema: {
      "$schema": "http://json-schema.org/draft-06/schema#",
      "properties": {
          "bar": {
              "$ref": "#/definitions/nonNegativeInteger"
          },
          "baz": {
              "type": "integer",
              "minimum": 0
          }
      },
      "definitions": {
          "nonNegativeInteger": {
              "type": "integer",
              "minimum": 0
          }
      }
  }