code: def update_datafeed(self, datafeed_id, body, params=None):
          
          for param in (datafeed_id, body):
              if param in SKIP_IN_PATH:
                  raise ValueError("Empty value passed for a required argument.")
          return self.transport.perform_request(
              "POST",
              _make_path("_ml", "datafeeds", datafeed_id, "_update"),
              params=params,
              body=body,
          )
docs: `<http://www.elastic.co/guide/en/elasticsearch/reference/current/ml-update-datafeed.html>`_
  
          :arg datafeed_id: The ID of the datafeed to update
          :arg body: The datafeed update settings