code: def iter_forks(self, number=-1, etag=None):
          
          url = self._build_url('forks', base_url=self._api)
          return self._iter(int(number), url, Gist, etag=etag)
docs: Iterator of forks of this gist.
  
          .. versionchanged:: 0.9
  
              Added params ``number`` and ``etag``.
  
          :param int number: (optional), number of forks to iterate over.
              Default: -1 will iterate over all forks of this gist.
          :param str etag: (optional), ETag from a previous request to this
              endpoint.
          :returns: generator of :class:`Gist <Gist>`