protected override Http2FrameCodec NewCodec(TestChannelInitializer childChannelInitializer, IHttp2FrameWriter frameWriter)
 {
     return(new Http2MultiplexCodecBuilder(true, childChannelInitializer).FrameWriter(frameWriter).Build());
 }
 protected override IChannelHandler NewMultiplexer(TestChannelInitializer childChannelInitializer)
 {
     return(null);
 }