{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "protobufNullValue",
  "description": "`NullValue` is a singleton enumeration to represent the null value for the\n`Value` type union.\n\nThe JSON representation for `NullValue` is JSON `null`.\n\n - NULL_VALUE: Null value.",
  "default": "NULL_VALUE",
  "enum": [
    "NULL_VALUE"
  ],
  "type": "string"
}