code: def show_input(self, template_helper, language, seed):
          
          header = ParsableText(self.gettext(language, self._header), "rst",
                                translation=self._translations.get(language, gettext.NullTranslations()))
          return str(DisplayableFileProblem.get_renderer(template_helper).tasks.file(self.get_id(), header, self._max_size, self._allowed_exts))
docs: Show FileBox