private void configureClearTextWithPriorKnowledge(SocketChannel ch) {
        ch.pipeline().addLast(connectionHandler, new PrefaceFrameWrittenEventHandler(), new UserEventLogger());
        configureEndOfPipeline(ch.pipeline());
    }
Configure the pipeline for a cleartext useing Prior-Knowledge method to start
http2.
remoting/remoting-http/src/main/java/com/alipay/sofa/rpc/transport/http/Http2ClientInitializer.java