protected ZuulFilter<HttpRequestMessage, HttpResponseMessage> newProxyEndpoint(HttpRequestMessage zuulRequest) {
        return new ProxyEndpoint(
                zuulRequest, getChannelHandlerContext(zuulRequest), getNextStage(), MethodBinding.NO_OP_BINDING);
    }
Override to inject your own proxy endpoint implementation

@param zuulRequest - the request message
@return the proxy endpoint
zuul-core/src/main/java/com/netflix/zuul/netty/filter/ZuulEndPointRunner.java