docs: private boolean consideringHierarchy(Publish p) {
  		boolean sent = false;
  		for (Entry<Class<?>, List<SubscriberParent>> e : p.mapping.entrySet()) {
  			if (e.getKey().isAssignableFrom(p.message.getClass())) {
  				for (SubscriberParent parent : e.getValue()) {
  					if (!predicateApplies(parent.getSubscriber(), p.message)) {
  						continue;
  					}
  					parent.getSubscriber().receiveO(p.message);
  					sent = true;
  				}
  			}
  		}
  		return sent;
  	}