public static function holder( $name = null ) 
	{	
		if ( !isset( $name ) ) 
		{
			$name = static::$_default;
		}
		
		if ( !isset( static::$instances[$name] ) ) 
		{
			 static::$instances[$name] = new CCAsset_Holder();
		}
		
		return static::$instances[$name];
	}