}
					if regionZoneSubZoneMap[region][zone][subZone] {
						return fmt.Errorf("locality %s overlap with previous specified ones", locality)
					}
					regionZoneSubZoneMap[region][zone][subZone] = true
				} else {
					regionZoneSubZoneMap[region][zone] = map[string]bool{subZone: true}
				}
			} else {
				regionZoneSubZoneMap[region] = map[string]map[string]bool{zone: {subZone: true}}
			}
		}
	}

	return nil

			ServicePortName: "service-port-name",
			ServiceAccount:  "service-account",
			Network:         "Network",
			Locality: Locality{
				ClusterID: "cluster-id",
				Label:     "region1/zone1/subzone1",
			},
			EndpointPort: 22,
			LbWeight:     100,
			TLSMode:      "mutual",
		},
	}
	differingAddr := exampleInstance.DeepCopy()
	differingAddr.Endpoint.Address = "another-address"

	defer os.Chdir(dir)
	// prepare a pod label file
	tempDir := t.TempDir()
	os.Chdir(tempDir)
	os.MkdirAll("./etc/istio/pod/", os.ModePerm)
	os.WriteFile(constants.PodInfoLabelsPath, []byte(`istio-locality="region.zone.subzone"`), 0o600)

	node, err := GetNodeMetaData(MetadataOptions{
		ID:                          "test",
		Envs:                        os.Environ(),
		ExitOnZeroActiveConnections: true,
	})

	g := NewWithT(t)

		Template: &v1alpha3.WorkloadEntry{
			Ports:          map[string]uint32{"http": 80},
			Labels:         map[string]string{"app": "a"},
			Network:        "nw0",
			Locality:       "reg0/zone0/subzone0",
			Weight:         1,
			ServiceAccount: "sa-a",
		},
	}
	// A valid Config.
	// This can be modified to have pseudo-random
	// values for more randomization.
	wgA = config.Config{
		Meta: config.Meta{

func ConvertLocality(locality string) *core.Locality {
	if locality == "" {
		return &core.Locality{}
	}

	region, zone, subzone := label.SplitLocalityLabel(locality)
	return &core.Locality{
		Region:  region,
		Zone:    zone,
		SubZone: subzone,
	}
}

// ALPNH2Only advertises that Proxy is going to use HTTP/2 when talking to the cluster.
var ALPNH2Only = []string{"h2"}

func (u uint128) or(m uint128) uint128 {
	return uint128{u.hi | m.hi, u.lo | m.lo}
}

// not returns the bitwise NOT of u.
func (u uint128) not() uint128 {
	return uint128{^u.hi, ^u.lo}
}

// subOne returns u - 1.
func (u uint128) subOne() uint128 {
	lo, borrow := bits.Sub64(u.lo, 1, 0)
	return uint128{u.hi - borrow, lo}
}

// addOne returns u + 1.
func (u uint128) addOne() uint128 {
	lo, carry := bits.Add64(u.lo, 1, 0)

				if loadAssignment.Endpoints[i] != nil {
					loadAssignment.Endpoints[i].LbEndpoints = nil
				}
			}
			break
		}
	}
}

// set locality loadbalancing priority - This is based on Region/Zone/SubZone matching.
func applyLocalityFailover(
	locality *core.Locality,
	loadAssignment *endpoint.ClusterLoadAssignment,
	failover []*v1alpha3.LocalityLoadBalancerSetting_Failover,
) {

message LoadBalancing {
  enum Scope {
    UNSPECIFIED_SCOPE = 0;
    // Prefer traffic in the same region.
    REGION = 1;
    // Prefer traffic in the same zone.
    ZONE = 2;
    // Prefer traffic in the same subzone.
    SUBZONE = 3;
    // Prefer traffic on the same node.
    NODE = 4;
    // Prefer traffic in the same cluster.
    CLUSTER = 5;
    // Prefer traffic in the same network.
    NETWORK = 6;
  }
  enum Mode {

		ls, f := proxy.Labels[model.LocalityLabel]
		if f {
			return util.ConvertLocality(ls)
		}
		return nil
	}
	return &core.Locality{
		Region:  region,
		Zone:    zone,
		SubZone: subzone,
	}
}

// initializeProxy completes the initialization of a proxy. It is expected to be called only after
// initProxyMetadata.
func (s *DiscoveryServer) initializeProxy(con *Connection) error {

		return &l
	}
	r, err := zoneToRegion(loc)
	if err != nil {
		log.Warnf("Error fetching GCP region: %v", err)
		return &l
	}
	return &core.Locality{
		Region:  r,
		Zone:    loc,
		SubZone: "", // GCP has no subzone concept
	}
}

const ComputeReadonlyScope = "https://www.googleapis.com/auth/compute.readonly"

// Labels attempts to retrieve the GCE instance labels within the timeout