How to use the relatorio.reporting.MIMETemplateLoader function in relatorio

keywords=None, comment_tags=None, **options):
            options['template_class'] = template_class
            content = BytesIO(content)
            if keywords is None:
                keywords = []
            if comment_tags is None:
                comment_tags = []

            for _, _, string, _ in genshi_extract(
                    content, keywords, comment_tags, options):
                if string:
                    yield string
        if not template_class:
            raise ValueError('a template class is required')
        return method
    factories = MIMETemplateLoader().factories
    extract_report_txt = extract_report_genshi(factories['text'])
    extract_report_xml = extract_report_genshi(
        factories.get('markup', factories.get('xml')))
    extract_report_html = extract_report_genshi(
        factories.get('markup', factories.get('xml')))
    extract_report_xhtml = extract_report_genshi(
        factories.get('markup', factories.get('xml')))
    del factories

    def set_report(self):
        pool = Pool()
        Report = pool.get('ir.action.report')
        Translation = pool.get('ir.translation')

        if self.model == Report:
            reports = self.records