}()

	// Notify the WaitGroup once the port has transitioned to ready.
	go s.awaitReady(func() {
		healthServer.SetServingStatus("", grpcHealth.HealthCheckResponse_SERVING)
		onReady()
	}, listener)

	return nil
}

func (s *grpcInstance) awaitReady(onReady OnReadyFunc, listener net.Listener) {
	defer onReady()

	err := retry.UntilSuccess(func() error {

	"istio.io/istio/pkg/config/protocol"
	"istio.io/istio/pkg/config/schema/gvk"
	"istio.io/istio/pkg/kube"
	"istio.io/istio/pkg/slices"
	"istio.io/istio/pkg/util/sets"
)

var (
	revision      = ""
	waitReady     bool
	allNamespaces bool

	deleteAll bool

	trafficType       = ""
	validTrafficTypes = sets.New(constants.ServiceTraffic, constants.WorkloadTraffic, constants.AllTraffic, constants.NoTraffic)