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