public function ContainerAwareEventDispatcher::hasListeners

File

core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php, line 204

Class

ContainerAwareEventDispatcher

A performance optimized container aware event dispatcher.

Namespace

Code

public function hasListeners($event_name = NULL) : bool {
  if ($event_name !== NULL) {
    return !empty($this->listeners[$event_name]);
  }
  foreach ($this->listeners as $event_listeners) {
    if ($event_listeners) {
      return TRUE;
    }
  }
  return FALSE;
}