protected void resumeInBindingContext(O zuulMesg, String filterName) {
        try {
            methodBinding(zuulMesg).bind(() -> resume(zuulMesg));
        } catch (Exception ex) {
            handleException(zuulMesg, filterName, ex);
        }
    }
This is typically set by a filter when wanting to reject a request and also reduce load on the server by
 not processing anymore filterChain
zuul-core/src/main/java/com/netflix/zuul/netty/filter/BaseZuulFilterRunner.java