code: func (g *Cloud) UpdateHealthCheck(hc *compute.HealthCheck) error {
  	ctx, cancel := cloud.ContextWithCallTimeout()
  	defer cancel()
  
  	mc := newHealthcheckMetricContext("update")
  	return mc.Observe(g.c.HealthChecks().Update(ctx, meta.GlobalKey(hc.Name), hc))
  }
docs: // UpdateHealthCheck applies the given HealthCheck as an update.