if (registrationId == null) {
throw new NullPointerException("registrationId can't be null");
}
EventService eventService = nodeEngine.getEventService();
return eventService.deregisterListener(SERVICE_NAME, SERVICE_NAME, registrationId);
}
@Override
public void dispatchEvent(MigrationEvent migrationEvent, MigrationListener migrationListener) {
final MigrationStatus status = migrationEvent.getStatus();