static void fireNewInstantiator(Instantiator instantiator) {
    for (RegistrationListener listener : listeners) {
      listener.newInstantiator(instantiator);
    }
  }
Alerts all {@code RegistrationListener}s that a new {@code Instantiator} has been registered

@see InternalDataSerializer.RegistrationListener#newInstantiator
geode-core/src/main/java/org/apache/geode/internal/InternalDataSerializer.java