code: func (g *Cloud) ListHealthChecks() ([]*compute.HealthCheck, error) {
  	ctx, cancel := cloud.ContextWithCallTimeout()
  	defer cancel()
  
  	mc := newHealthcheckMetricContext("list")
  	v, err := g.c.HealthChecks().List(ctx, filter.None)
  	return v, mc.Observe(err)
  }
docs: // ListHealthChecks lists all HealthCheck in the project.