How to use the pytablewriter.style._font.FontSize function in pytablewriter

def __repr__(self):
        items = []

        if self.align:
            items.append("align={}".format(self.align.align_string))
        if self.font_size is not FontSize.NONE:
            items.append("font_size={}".format(self.font_size.value))
        if self.font_style:
            items.append("font_style={}".format(self.font_style.value))
        if self.font_weight:
            items.append("font_weight={}".format(self.font_weight.value))
        if self.thousand_separator is not ThousandSeparator.NONE:
            items.append("thousand_separator={}".format(self.thousand_separator.value))

        return "({})".format(", ".join(items))

def _font_size_map(self):
        return {
            FontSize.TINY: r"\tiny",
            FontSize.SMALL: r"\small",
            FontSize.MEDIUM: r"\normalsize",
            FontSize.LARGE: r"\large",
        }

def __init__(self, **kwargs):
        self.__align = normalize_enum(kwargs.pop("align", Align.AUTO), Align)
        self.__validate_attr("align", Align)

        self.__font_size = normalize_enum(kwargs.pop("font_size", FontSize.NONE), FontSize)
        self.__validate_attr("font_size", FontSize)

        self.__font_style = normalize_enum(kwargs.pop("font_style", FontStyle.NORMAL), FontStyle)
        self.__validate_attr("font_style", FontStyle)

        self.__font_weight = normalize_enum(
            kwargs.pop("font_weight", FontWeight.NORMAL), FontWeight
        )
        self.__validate_attr("font_weight", FontWeight)

        self.__thousand_separator = self.__normalie_thousand_separator(
            normalize_enum(
                kwargs.pop("thousand_separator", ThousandSeparator.NONE), ThousandSeparator
            )
        )
        self.__validate_attr("thousand_separator", ThousandSeparator)

def _font_size_map(self):
        return {
            FontSize.TINY: r"\tiny",
            FontSize.SMALL: r"\small",
            FontSize.MEDIUM: r"\normalsize",
            FontSize.LARGE: r"\large",
        }

def _font_size_map(self):
        return {
            FontSize.TINY: "font-size:x-small",
            FontSize.SMALL: "font-size:small",
            FontSize.MEDIUM: "font-size:medium",
            FontSize.LARGE: "font-size:large",
        }

def _font_size_map(self):
        return {
            FontSize.TINY: r"\tiny",
            FontSize.SMALL: r"\small",
            FontSize.MEDIUM: r"\normalsize",
            FontSize.LARGE: r"\large",
        }

def _font_size_map(self):
        return {
            FontSize.TINY: "font-size:x-small",
            FontSize.SMALL: "font-size:small",
            FontSize.MEDIUM: "font-size:medium",
            FontSize.LARGE: "font-size:large",
        }

def __init__(self, **kwargs):
        self.__align = normalize_enum(kwargs.pop("align", Align.AUTO), Align)
        self.__validate_attr("align", Align)

        self.__font_size = normalize_enum(kwargs.pop("font_size", FontSize.NONE), FontSize)
        self.__validate_attr("font_size", FontSize)

        self.__font_style = normalize_enum(kwargs.pop("font_style", FontStyle.NORMAL), FontStyle)
        self.__validate_attr("font_style", FontStyle)

        self.__font_weight = normalize_enum(
            kwargs.pop("font_weight", FontWeight.NORMAL), FontWeight
        )
        self.__validate_attr("font_weight", FontWeight)

        self.__thousand_separator = self.__normalie_thousand_separator(
            normalize_enum(
                kwargs.pop("thousand_separator", ThousandSeparator.NONE), ThousandSeparator
            )
        )
        self.__validate_attr("thousand_separator", ThousandSeparator)

def _font_size_map(self):
        return {
            FontSize.TINY: r"\tiny",
            FontSize.SMALL: r"\small",
            FontSize.MEDIUM: r"\normalsize",
            FontSize.LARGE: r"\large",
        }