public function multiCancel(MultiValues $request): RedirectResponse 	{ 		$notifications = Notification::whereNotNull('scheduled_at') 			->where('canceled', false) 			->whereNotNull('external_id') 			->whereDate('scheduled_at', '>', formatTimestamp()) 			->whereIn('id', $request->values) 			->get();  		foreach ($notifications as $notification) { 			$notification->cancel(); 		}  		return $this->redirectFromSave(); 	}