How to use the cu2qu.ufo.fonts_to_quadratic function in cu2qu

def generateTTFs(self):
        """Build TTF for each font generated since last call to generateTTFs."""

        fonts = [OpenFont(ufo) for ufo in self.generatedFonts]
        self.generatedFonts = []

        log(">> Converting curves to quadratic")
        # using a slightly higher max error (e.g. 0.0025 em), dots will have
        # fewer control points and look noticeably different
        max_err = 0.002
        if self.compatible:
            fonts_to_quadratic(fonts, max_err_em=max_err, dump_stats=True, reverse_direction=True)
        else:
            for font in fonts:
                fonts_to_quadratic([font], max_err_em=max_err, dump_stats=True, reverse_direction=True)

        log(">> Generating TTF files")
        for font in fonts:
            ttfName = self.generateOutputPath(font, "ttf")
            log(os.path.basename(ttfName))
            saveOTF(
                font, ttfName,
                self.thinGlyphOrder if "Thin" in ttfName else self.glyphOrder,
                truetype=True)

def generateTTFs(self):
        """Build TTF for each font generated since last call to generateTTFs."""

        fonts = [OpenFont(ufo) for ufo in self.generatedFonts]
        self.generatedFonts = []

        log(">> Converting curves to quadratic")
        # using a slightly higher max error (e.g. 0.0025 em), dots will have
        # fewer control points and look noticeably different
        max_err = 0.002
        if self.compatible:
            fonts_to_quadratic(fonts, max_err_em=max_err, dump_stats=True, reverse_direction=True)
        else:
            for font in fonts:
                fonts_to_quadratic([font], max_err_em=max_err, dump_stats=True, reverse_direction=True)

        log(">> Generating TTF files")
        for font in fonts:
            ttfName = self.generateOutputPath(font, "ttf")
            log(os.path.basename(ttfName))
            saveOTF(
                font, ttfName,
                self.thinGlyphOrder if "Thin" in ttfName else self.glyphOrder,
                truetype=True)

def process(self):
        from cu2qu.ufo import fonts_to_quadratic

        # first apply all custom pre-filters
        for funcs, ufo, glyphSet in zip(self.preFilters, self.ufos, self.glyphSets):
            for func in funcs:
                func(ufo, glyphSet)

        fonts_to_quadratic(
            self.glyphSets,
            max_err=self._conversionErrors,
            reverse_direction=self._reverseDirection,
            dump_stats=True,
            remember_curve_type=self._rememberCurveType and self.inplace,
        )

        decompose = DecomposeComponentsFilter(include=lambda g: len(g))
        for ufo, glyphSet in zip(self.ufos, self.glyphSets):
            decompose(ufo, glyphSet)

        # finally apply all custom post-filters
        for funcs, ufo, glyphSet in zip(self.postFilters, self.ufos, self.glyphSets):
            for func in funcs:
                func(ufo, glyphSet)