code: void findHandlers(ListIterator<PathElement> iterator, String value, Notification notification, Collection<NotificationHandler> handlers) {
          NotificationHandlerNodeRegistry registry = childRegistries.get(value);
          if (registry != null) {
              registry.findEntries(iterator, handlers, notification);
          }
          // if a child registry exists for the wildcard, we traverse it too
          NotificationHandlerNodeRegistry wildCardRegistry = childRegistries.get(WILDCARD_VALUE);
          if (wildCardRegistry != null) {
              wildCardRegistry.findEntries(iterator, handlers, notification);
          }
      }
docs: Get the registry child for the given {@code elementValue} and traverse it to collect the handlers that match the notifications.
  If the subregistry has a children for the {@link org.jboss.as.controller.PathElement#WILDCARD_VALUE}, it is also traversed.