code: def iter_network_events(self, number=-1, etag=None):
          
          base = self._api.replace('repos', 'networks', 1)
          url = self._build_url('events', base_url=base)
          return self._iter(int(number), url, Event, etag)
docs: Iterates over events on a network of repositories.
  
          :param int number: (optional), number of events to return. Default: -1
              returns all available events
          :param str etag: (optional), ETag from a previous request to the same
              endpoint
          :returns: generator of :class:`Event <github3.events.Event>`\ s