code: private void configureHttp2Pipeline(ChannelPipeline pipeline) {
          pipeline.addLast(Constants.CONNECTION_HANDLER, http2ConnectionHandler);
          pipeline.addLast(Constants.HTTP2_TARGET_HANDLER, http2TargetHandler);
          pipeline.addLast(Constants.DECOMPRESSOR_HANDLER, new HttpContentDecompressor());
      }
docs: Creates the pipeline for http2 requests which does not involve a connection upgrade.
  
  @param pipeline the client channel pipeline