code: def go_standby(self, comment=None):
          
          self.make_request(
              NodeCommandFailed,
              method='update',
              resource='go_standby',
              params={'comment': comment})
docs: Executes a Go-Standby operation on the specified node.
          To get the status of the current node/s, run :func:`status`
  
          :param str comment: optional comment to audit
          :raises NodeCommandFailed: engine cannot go standby
          :return: None