code: func (gce *Cloud) UpdateHTTPHealthCheck(hc *compute.HttpHealthCheck) error {
  	op, err := gce.service.HttpHealthChecks.Update(gce.projectID, hc.Name, hc).Do()
  	if err != nil {
  		return err
  	}
  	return gce.waitForGlobalOp(op)
  }
docs: // UpdateHTTPHealthCheck applies the given HTTPHealthCheck as an update.