Array
(
    [pa_color] => WC_Product_Attribute Object
        (
            [data:protected] => Array
                (
                    [id] => 0
                    [name] => pa_color
                    [options] => Array
                        (
                            [0] => Color
                        )

                    [position] => 1
                    [visible] => 1
                    [variation] => 1
                )

        )

    [pa_razmer] => WC_Product_Attribute Object
        (
            [data:protected] => Array
                (
                    [id] => 0
                    [name] => pa_razmer
                    [options] => Array
                        (
                            [0] => Size
                        )

                    [position] => 1
                    [visible] => 1
                    [variation] => 1
                )

        )

)
Nomenclature