Sulu\Component\Security\Event\PermissionUpdateEvent::getType PHP Method

    public function getType()
    {
        return $this->type;
    }

 public function onPermissionUpdate(PermissionUpdateEvent $permissionUpdateEvent)
 {
     if ($permissionUpdateEvent->getType() !== SecurityBehavior::class) {
         return;
     }
     $document = $this->documentManager->find($permissionUpdateEvent->getIdentifier());
     $this->searchManager->deindex($document);
 }