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