{
    "skin_tone" : {

        "name": "Skin Tone",
        "group_name" : "skin_tone",
        "group_parts" : [
            "skin_head",
            "skin_neck",
            "skin_arm_right",
            "skin_arm_left",
            "skin_hand_right",
            "skin_hand_left",
            "skin_leg_right",
            "skin_leg_left"
        ],
        "variant" : 8,
        "format": "tint<variant>",
        "folder": "Groups/Skin Tone",
        "subfolder": "."
    },

    "eye_pair" : {
        "name": "Eye Pair",
        "group_name" : "eye_pair",
        "group_parts" : ["eye_right", "eye_left"],
        "variant": ["large", "small"],
        "color" : ["Black", "Blue", "Brown", "Green", "Pine"],
        "format" : "eyepair<color>_<variant>",
        "folder" : "Groups/Eye Pair",
        "subfolder": "."
    }

}
{
    "skin_tone" : {

        "name": "Skin Tone",
        "group_name" : "skin_tone",
        "group_parts" : [
            "skin_head",
            "skin_neck",
            "skin_arm_right",
            "skin_arm_left",
            "skin_hand_right",
            "skin_hand_left",
            "skin_leg_right",
            "skin_leg_left"
        ],
        "group_mapping" :{
            "variant" : "variant",
        },
        "variant" : 8,
        "format": "tint<variant>",
        "folder": "Groups/Skin Tone",
        "subfolder": "."
    },

    "eye_pair" : {
        "name": "Eye Pair",
        "group_name" : "eye_pair",
        "group_parts" : ["eye_right", "eye_left"],
        "variant": ["large", "small"],
        "color" : ["Black", "Blue", "Brown", "Green", "Pine"],
        "format" : "eyepair<color>_<variant>",
        "folder" : "Groups/Eye Pair",
        "subfolder": "."
    }

}
Add attribute for mappng parent group to part attributes
Add attribute for mappng parent group to part attributes
