def _differentiate_area_3d_chart_type(cls, plot):
        return {
            ST_Grouping.STANDARD: XL.THREE_D_AREA,
            ST_Grouping.STACKED: XL.THREE_D_AREA_STACKED,
            ST_Grouping.PERCENT_STACKED: XL.THREE_D_AREA_STACKED_100,
        }[plot._element.grouping_val]