PDOWrapper::instance PHP Метод

    public static function instance()
    {
        if (!isset(self::$instance)) {
            self::$instance = new PDOWrapper();
        }
        return self::$instance;
    }

 /**
  * method instance.
  * 	- static, for singleton, for creating a global instance of this object
  *
  * @return - PDOWrapper Object
  */
 public static function instance()
 {
     if (!isset(self::$instance)) {
         self::$instance = new PDOWrapper();
     }
     return self::$instance;
 }