docs: def append_headers(f):
      """
      Appends all the web headers:
        * ZSL version and information,
        * default CORS if not already set up,
        * cache.
  
      :param f: The decorated function.
      :return: The function which appends the web headers.
      """
      @wraps(f)
      def _response_decorator(*args, **kwargs):
          r = f(*args, **kwargs)
          response = r if isinstance(r, Response) else make_response(r)
          append_all(response)
          return response
  
      return _response_decorator