anchor.diff:     * -1 - which is also the default if not set.
      */
     int get contentLength => zResponse.contentLength;
  +  void set contentLength(int _contentLength) {
  +    zResponse.contentLength = _contentLength;
  +  }
   
     /**
      * Gets and sets the persistent connection state. The initial value
  
positive.code:    * request.
     */
    bool get persistentConnection => zResponse.persistentConnection;
  
    /**
     * Gets and sets the reason phrase. If no reason phrase is explicitly
     * set a default reason phrase is provided.
     */
    String get reasonPhrase => zResponse.reasonPhrase;
  
    /**
     * Gets and sets the status code. Any integer value is accepted. For
  
negative.code:    * The [deadline] is `null` by default.
     */
    Duration get deadline => zResponse.deadline;
    void set deadline(Duration _deadline) {
      zResponse.deadline = _deadline;
    }
  
    /**
     * Gets information about the client connection. Returns [:null:] if the
  