docs: def _generate_atom_feed(self, feed):
          """
          A function returning a feed like `feedgen.feed.FeedGenerator`.
          The function can be overwritten when used in other applications.
  
          :param feed: a feed object
          :return: an atom feed `feedgen.feed.FeedGenerator`
          """
          atom_feed = self.init_atom_feed(feed)
          atom_feed.title("Feed")
          return atom_feed