class Http2MultiplexCodec extends Http2FrameCodec {

    @Override
    final void onHttp2FrameStreamException(ChannelHandlerContext ctx, Http2FrameStreamException cause) {
        Http2FrameStream stream = cause.stream();
        DefaultHttp2StreamChannel childChannel = ((Http2MultiplexCodecStream) stream).channel;

        try {
            childChannel.pipeline().fireExceptionCaught(cause.getCause());
        } finally {
            childChannel.unsafe().closeForcibly();
        }
    }

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

}