code: func (gce *Cloud) DeleteRoute(clusterName string, route *cloudprovider.Route) error {
  	deleteOp, err := gce.service.Routes.Delete(gce.projectID, route.Name).Do()
  	if err != nil {
  		return err
  	}
  	return gce.waitForGlobalOp(deleteOp)
  }
docs: // DeleteRoute deletes a route