docs: private void pingNotifiableEventListener(String topic, Registration registration, boolean register) {
          Object listener = registration.getListener();
          if (!(listener instanceof NotifiableEventListener)) {
              EventFilter filter = registration.getFilter();
              if (filter instanceof ListenerWrapperEventFilter) {
                  listener = ((ListenerWrapperEventFilter) filter).getListener();
              }
          }
          pingNotifiableEventListenerInternal(listener, topic, registration, register);
          pingNotifiableEventListenerInternal(service, topic, registration, register);
      }