anchor.diff:    Map<String, String> _queryParameters;
     _HttpInputStream _inputStream;
     _BufferList _buffer;
  -  bool _dataEndCalled = false;
     Function _streamErrorHandler;
     _HttpSession _session;
   }
  
positive.code:   InputStream get inputStream {
      if (_inputStream == null) {
        _inputStream = new _HttpInputStream(this);
        _inputStream._streamMarkedClosed = _dataEndCalled;
      }
      return _inputStream;
    }
  
negative.code:   _HttpClientConnection _connection;
    _HttpInputStream _inputStream;
    _BufferList _buffer;
  
    Function _streamErrorHandler;
  }
  