protected function propagateCollectionChangedEvent(CollectionChangedEvent $event)
    {
        foreach ($this->collection_listeners as $listener) {
            $listener->onCollectionChanged($event);
        }
    }
protected function propagateCollectionChangedEvent(CollectionChangedEvent $event)
    {
        foreach ($this->collection_listeners as $listener) {
            $listener->onCollectionChanged($event);
        }
    }
protected function propagateCollectionChangedEvent ( CollectionChangedEvent $ event ) { foreach ( $ this -> collection_listeners as $ listener ) { $ listener -> onCollectionChanged ( $ event ) ; } }
Propagate the given collection-changed event to all currently attached listeners.
Propagate the given collection - changed event to all currently attached listeners .