How to use the pywaffle.waffle.RegularTextLegend function in pywaffle

x = xdescent + width / 2.0
        y = ydescent + height / 2.0
        kwargs = {
            "horizontalalignment": "center",
            "verticalalignment": "center",
            "color": orig_handle.color,
            "fontproperties": fm.FontProperties(fname=self.font_file, size=fontsize),
        }
        kwargs.update(orig_handle.kwargs)
        annotation = Text(x, y, orig_handle.text, **kwargs)
        return [annotation]


HANDLER_MAP = {
    SolidTextLegend: TextLegendHandler(FONTAWESOME_FILES["solid"]),
    RegularTextLegend: TextLegendHandler(FONTAWESOME_FILES["regular"]),
    BrandsTextLegend: TextLegendHandler(FONTAWESOME_FILES["brands"]),
}


class Waffle(Figure):
    """

    A custom Figure class to make waffle charts.

    :param values: Numerical value of each category. If it is a dict, the keys would be used as labels.
    :type values: list|dict|pandas.Series

    :param rows: The number of lines of the waffle chart.
    :type rows: int

    :param columns: The number of columns of the waffle chart.