@Override
  protected void initChannel(Channel ch) throws Exception {
    ChannelPipeline p = ch.pipeline();
    p.addLast(http2StreamFrameToHttpObjectCodec);
    p.addLast(new HttpObjectAggregator(http2ClientConfig.http2MaxContentLength));
    p.addLast(http2BlockingChannelResponseHandler);
    p.addLast(ambrySendToHttp2Adaptor);
  }
A ChannelInitializer used to setup stream channel pipeline once stream is created in {@link MultiplexedChannelRecord}.
ambry-network/src/main/java/com/github/ambry/network/http2/Http2BlockingChannelStreamChannelInitializer.java