public void invokeNext(HttpContent chunk) {
        try {
            ByteBufUtil.touch(chunk, "ProxyEndpoint received chunk from origin, request: ", zuulRequest);
            methodBinding.bind(() -> filterResponseChunk(chunk));
        } catch (Exception ex) {
            ByteBufUtil.touch(chunk, "ProxyEndpoint exception processing chunk from origin, request: ", zuulRequest);
            unlinkFromOrigin();
            logger.error("Error in invokeNext content", ex);
            channelCtx.fireExceptionCaught(ex);
        }
    }
Get the implementing origin.
<p>
Note: this method gets called in the constructor so if overloading it or any methods called within, you cannot
rely on your own constructor parameters.
zuul-core/src/main/java/com/netflix/zuul/filters/endpoint/ProxyEndpoint.java