public static function getOrder()
    {
        $cls = get_called_class();
        return array_key_exists($cls, self::$_order) ? self::$_order[$cls] : "";
    }
public static function getOrder()
    {
        $cls = get_called_class();
        return array_key_exists($cls, self::$_order) ? self::$_order[$cls] : "";
    }
public static function getOrder ( ) { $ cls = get_called_class ( ) ; return array_key_exists ( $ cls , self :: $ _order ) ? self :: $ _order [ $ cls ] : "" ; }
Returns the default order.
If not specified, returns an empty string.

@return string order
Returns the default order . If not specified returns an empty string .