public function queue($subject, $body, $notificationType, $action)
 {
     $notificationsToQueueEmailsFor = Notification::where('notification_type_id', $notificationType)->get();
     foreach ($notificationsToQueueEmailsFor as $notification) {
         $email = new Email();
         $email->notification()->associate($notification);
         $email->subject = $subject;
         $email->body = $body;
         $email->status = $action;
         $email->save();
     }
 }