docs: public StreamSinkChannel getResponseChannel() {
          if (responseChannel != null) {
              return null;
          }
          final ConduitWrapper<StreamSinkConduit>[] wrappers = responseWrappers;
          this.responseWrappers = null;
          final ConduitStreamSinkChannel sinkChannel = connection.getSinkChannel();
          if (sinkChannel == null) {
              return null;
          }
          if(wrappers != null) {
              final WrapperStreamSinkConduitFactory factory = new WrapperStreamSinkConduitFactory(wrappers, responseWrapperCount, this, sinkChannel.getConduit());
              sinkChannel.setConduit(factory.create());
          } else {
              sinkChannel.setConduit(connection.getSinkConduit(this, sinkChannel.getConduit()));
          }
          this.responseChannel = new WriteDispatchChannel(sinkChannel);
          this.startResponse();
          return responseChannel;
      }