code: def scroll(self, scroll_id, params={}, callback=None, **kwargs):
          
  
          query_params = ('scroll',)
  
          params = self._filter_params(query_params, params)
  
          url = self.mk_url(*['/_search/scroll'], **params)
  
          self.client.fetch(
              self.mk_req(url, method='GET', body=scroll_id, **kwargs),
              callback = callback
          )
docs: Scroll a search request created by specifying the scroll parameter.
          `<http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-scroll.html>`_
          :arg scroll_id: The scroll ID
          :arg scroll: Specify how long a consistent view of the index should be
              maintained for scrolled search