docs: def init_atom_feed(self, feed):
          """
          Initializing an atom feed `feedgen.feed.FeedGenerator` given a feed object
  
          :param feed: a feed object
          :return: an atom feed `feedgen.feed.FeedGenerator`
          """
          atom_feed = FeedGenerator()
          atom_feed.id(id=self.request.route_url(self.get_atom_feed_url, id=feed.id))
          atom_feed.link(href=self.request.route_url(self.get_atom_feed_url, id=feed.id), rel='self')
          atom_feed.language('nl-BE')
          self.link_to_sibling(feed, 'previous', atom_feed)
          self.link_to_sibling(feed, 'next', atom_feed)
          return atom_feed