docs: def next_listing(self, limit=None):
          """GETs next :class:`Listing` directed to by this :class:`Listing`.  Returns :class:`Listing` object.
          
          :param limit: max number of entries to get
          :raise UnsupportedError: raised when trying to load more comments
          """
          if self.after:
              return self._reddit._limit_get(self._path, params={'after': self.after}, limit=limit or self._limit)
          elif self._has_literally_more:
              more = self[-1]
              data = dict(
                  link_id=self[0].parent_id,
                  id=more.name,
                  children=','.join(more.children)
              )
              j = self._reddit.post('api', 'morechildren', data=data)
              # since reddit is inconsistent here, we're hacking it to be
              # consistent so it'll work with _thingify
              d = j['json']
              d['kind'] = 'Listing'
              d['data']['children'] = d['data']['things']
              del d['data']['things']
              return self._reddit._thingify(d, path=self._path) 
          else:
              raise NoMoreError('no more items')