protected static function Desc(DBInterfaces\IDatabaseConnection $connection, Selectable $selectable)
    {
        return new self($connection, $selectable, self::$desc);    
    }
protected static function Desc(DBInterfaces\IDatabaseConnection $connection, Selectable $selectable)
    {
        return new self($connection, $selectable, self::$desc);    
    }
protected static function Desc ( DBInterfaces \ IDatabaseConnection $ connection , Selectable $ selectable ) { return new self ( $ connection , $ selectable , self :: $ desc ) ; }
A descending order of the selectable
@param Selectable $selectable
@return Order
A descending order of the selectable