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