public static function isWatching($item_id, $item_type, $created_by)
	{
		if ($item_id && $item_type && $created_by)
		{
			$total = self::all()
				->whereEquals('state', 1)
				->whereEquals('created_by', (int)$created_by)
				->whereEquals('item_id', (int)$item_id)
				->whereEquals('item_type', (string)$item_type)
				->total();

			if ($total)
			{
				return true;
			}
		}

		return false;
	}