Array
(
    [4] => Array
        (
            [group_name] => VOLUME en Litre
            [name] => VOLUME en Litre
            [group_type] => select
            [default] => -1
            [attributes] => Array
                (
                    [261] => 94
                )

            [attributes_quantity] => Array
                (
                    [261] => 0
                )

        )

)