public function _delete()
 {
     $id = abs((int) $_GET['id']);
     if (!$id) {
         return;
     }
     $subscriber = new EmailSubscriberEntity($id);
     $subscriber->deleteObject();
     App::add('Email Subscriber with email  "' . $subscriber->getEmail() . '" deleted');
     Messages::sendMessage('Subscriber deleted');
     back();
 }