code: def common_bootsrap_payload(self):
          
          messages = get_flashed_messages(with_categories=True)
          locale = str(get_locale())
          return {
              'flash_messages': messages,
              'conf': {k: conf.get(k) for k in FRONTEND_CONF_KEYS},
              'locale': locale,
              'language_pack': get_language_pack(locale),
              'feature_flags': get_feature_flags(),
          }
docs: Common data always sent to the client