code: @Override
      public Result call(Route route, RequestContext context) throws Exception {
          if (getMembers().isEmpty()) {
              return context.proceed();
          } else {
              return super.call(route, context);
          }
      }
docs: Methods called on incoming request. If there are no members attached to this balancer, the request is
  processed using {@link org.wisdom.api.interception.RequestContext#proceed()}. Otherwise, a member is selected
  and the request is delegated.
  
  @param route   the route
  @param context the filter context
  @return the result
  @throws Exception when the request cannot be handled correctly