/**
  * {@inheritdoc}
  */
 public function getListeners($event = null)
 {
     return $this->events->getListeners($event);
 }
 /**
  *
  * {@inheritdoc}
  *
  */
 public function getListeners($eventName = null)
 {
     return $this->dispatcher->getListeners($eventName);
 }
 /**
  * {@inheritdoc}
  */
 public function getListeners($eventName = null, $withPriorities = false)
 {
     return $this->dispatcher->getListeners($eventName, $withPriorities);
 }