private function toSession ($message, $type = Notification::ERROR, $isRaw = false, $canHide = true)
		{
			$ntf = new Notification($message, $type, $isRaw, $canHide);

			$notification = isset($_SESSION[ 'notification' ]) ? $_SESSION[ 'notification' ] : [];
			$notification[ $type ][] = $ntf->message;

			$_SESSION[ 'notification' ] = $notification;
		}