namespaces, err := namespace.GetAll(t)
	if err != nil {
		return fmt.Errorf("failed retrieving list of namespaces: %v", err)
	}

	// Restrict egress from this namespace to only those endpoints in the same Echos.
	cfg := t.ConfigIstio().New()
	cfg.Eval(ns.Name(), map[string]any{
		"Namespaces": namespaces,
	}, `
apiVersion: networking.istio.io/v1alpha3
kind: Sidecar
metadata:
  name: restrict-to-namespace
spec:

}

func getNamespace(kubeClient kube.CLIClient, ns string) (*corev1.Namespace, error) {
	nsObj, err := kubeClient.Kube().CoreV1().Namespaces().Get(context.Background(), ns, metav1.GetOptions{})
	if errors.IsNotFound(err) {
		return nil, fmt.Errorf("namespace: %s not found", ns)
	} else if err != nil {
		return nil, fmt.Errorf("failed to get namespace %s: %v", ns, err)
	}
	return nsObj, nil

	}

	// try fetching the namespace-defined waypoint
	namespace := ptr.OrEmpty[*v1.Namespace](krt.FetchOne[*v1.Namespace](ctx, Namespaces, krt.FilterKey(o.Namespace)))
	// this probably should never be nil. How would o exist in a namespace we know nothing about? maybe edge case of starting the controller or ns delete?
	if namespace != nil {
		// toss isNone, we don't need to know /why/ we got nil

	// Only the first per-cluster entry for a given config should have a non-nil ref.
	refs []*echo.Instance
	// namespaces caches namespaces by their prefix; used for converting Static namespace from configs into actual
	// namespaces
	namespaces map[string]namespace.Instance
	// the set of injection templates for each cluster
	templates map[string]sets.String

      namespaces:
        from: Same
  - name: {{.Service}}-svc
    hostname: {{.Service}}.{{.Namespace}}.svc
    port: {{.Port}}
    protocol: HTTP
    allowedRoutes:
      namespaces:
        from: Same
  - name: {{.Service}}-namespace
    hostname: {{.Service}}.{{.Namespace}}
    port: {{.Port}}
    protocol: HTTP
    allowedRoutes:
      namespaces:
        from: Same

}

func (a *index) serviceEntryServiceBuilder(
	Waypoints krt.Collection[Waypoint],
	Namespaces krt.Collection[*v1.Namespace],
) krt.TransformationMulti[*networkingclient.ServiceEntry, model.ServiceInfo] {
	return func(ctx krt.HandlerContext, s *networkingclient.ServiceEntry) []model.ServiceInfo {
		waypoint := fetchWaypointForService(ctx, Waypoints, Namespaces, s.ObjectMeta)

	pluginServer := startCniPluginServer(ctx, "/tmp/test.sock", handlers, dpServer)

	// label the namespace
	labelsPatch := []byte(fmt.Sprintf(`{"metadata":{"labels":{"%s":"%s"}}}`,
		constants.DataplaneModeLabel, constants.DataplaneModeAmbient))
	_, err := client.Kube().CoreV1().Namespaces().Patch(ctx, ns.Name,
		types.MergePatchType, labelsPatch, metav1.PatchOptions{})
	assert.NoError(t, err)

	lock sync.Mutex
}

// UserNamespace holds the configuration for the user namespace.
type userNamespace struct {
	// UIDs mappings for the user namespace.
	UIDMappings []idMapping `json:"uidMappings"`
	// GIDs mappings for the user namespace.
	GIDMappings []idMapping `json:"gidMappings"`
}

// Pod user namespace mapping
type idMapping struct {
	// Required.
	HostId uint32 `json:"hostId"`
	// Required.

		return nil
	}
	namespaces := []string{}
	for _, ns := range r.Namespaces {
		if ls.Matches(toNamespaceSet(ns.Name, ns.Labels)) {
			namespaces = append(namespaces, ns.Name)
		}
	}
	// Ensure stable order
	sort.Strings(namespaces)
	return namespaces
}

func nilOrEqual(have *string, expected string) bool {
	return have == nil || *have == expected
}

func humanReadableJoin(ss []string) string {

			serviceaccounts = append(serviceaccounts, kubeToIstioServiceAccount(ksa, svc.Namespace, mesh))
		}
	}
	if svc.Annotations[annotation.NetworkingExportTo.Name] != "" {
		namespaces := strings.Split(svc.Annotations[annotation.NetworkingExportTo.Name], ",")
		exportTo = sets.NewWithLength[visibility.Instance](len(namespaces))
		for _, ns := range namespaces {
			exportTo.Insert(visibility.Instance(ns))
		}
	}