@Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        copyAttrsFromParentChannel(this.parent, ctx.channel());
        addHttp2MetricsHandlers(ctx.pipeline());
        addHttp2StreamSpecificHandlers(ctx.pipeline());
        addHttpHandlerFn.accept(ctx.pipeline());

        ctx.pipeline().remove(this);
    }
TODO - can this be done when we create the Http2StreamChannelBootstrap instead now?
zuul-core/src/main/java/com/netflix/zuul/netty/server/http2/Http2StreamInitializer.java