/**
* Helper method for unsubscribing objects from the router's event
* dispatcher.
*
* Silent if $subscriber does not implement `Subscriber`.
*
* @param mixed $subscriber
* @return bool
*/
protected function unsubscribe($subscriber)
{
if ($this->eventDispatcher && $subscriber instanceof Subscriber) {
$this->eventDispatcher->unsubscribe($subscriber);
return true;
}
return false;
}
