@Override
 public Collection<SubscriptionSubscriber> getSubscribers(
     final Collection<? extends SubscriptionResource> resources, final SubscriptionMethod method) {
   return realService.getSubscribers(resources);
 }
 @Override
 public Collection<SubscriptionSubscriber> getSubscribers(
     final SubscriptionResource resource, final SubscriptionMethod method) {
   return realService.getSubscribers(resource, method);
 }