class Http2MultiplexCodec extends Http2FrameCodec {

  @Override
  final void onHttp2StreamWritabilityChanged(
      final ChannelHandlerContext ctx, final Http2FrameStream stream, final boolean writable) {
    (((Http2MultiplexCodecStream) stream).channel).writabilityChanged(writable);
  }

    Http2MultiplexCodec(
      final Http2ConnectionEncoder encoder,
      final Http2ConnectionDecoder decoder,
      final Http2Settings initialSettings,
      final ChannelHandler inboundStreamHandler,
      final ChannelHandler upgradeStreamHandler,
      final boolean decoupleCloseAndGoAway);

}