code: function() {
    /**
     * Protobuf raw bytes stream parser
     * @private {?JsonStreamParser}
     */
    this.jsonStreamParser_ = null;
  
    /**
     * The current error message, if any.
     * @private {?string}
     */
    this.errorMessage_ = null;
  
    /**
     * The current position in the streamed data.
     * @private {number}
     */
    this.streamPos_ = 0;
  
    /**
     * The current parser state.
     * @private {!State}
     */
    this.state_ = State.INIT;
  
    /**
     * The currently buffered result (parsed JSON objects).
     * @private {!Array<!Object>}
     */
    this.result_ = [];
  
    /**
     * Whether the status has been parsed.
     * @private {boolean}
     */
    this.statusParsed_ = false;
  }
docs: A stream parser of StreamBody message in Protobuf-JSON format.
  
  @constructor
  @struct
  @implements {StreamParser}
  @final