docs: def render(self):
          """Render the form and all sections to HTML"""
          return Markup(env.get_template('form.html').render(form=self,
                                                             render_open_tag=True,
                                                             render_close_tag=True,
                                                             render_before=True,
                                                             render_sections=True,
                                                             render_after=True,
                                                             generate_csrf_token=None if self.disable_csrf else _csrf_generation_function))