// insert records a new label declaration for the current block.
// The label must not have been declared before in any block.
func (b *block) insert(s *syntax.LabeledStmt) {
	name := s.Label.Value
	if debug {
		assert(b.gotoTarget(name) == nil)
	}
	labels := b.labels
	if labels == nil {
		labels = make(map[string]*syntax.LabeledStmt)
		b.labels = labels
	}
	labels[name] = s
}

// This file is a modified concatenation of the files
// $GOROOT/test/label.go and $GOROOT/test/label1.go.

package labels

var x int

func f0() {
L1 /* ERROR "label L1 declared and not used" */ :
	for {
	}
L2 /* ERROR "label L2 declared and not used" */ :
	select {
	}
L3 /* ERROR "label L3 declared and not used" */ :
	switch {
	}
L4 /* ERROR "label L4 declared and not used" */ :
	if true {
	}

}

// newPodLabels creates pod labels from v1.Pod.
func newPodLabels(pod *v1.Pod) map[string]string {
	labels := map[string]string{}

	// Get labels from v1.Pod
	for k, v := range pod.Labels {
		labels[k] = v
	}

	labels[types.KubernetesPodNameLabel] = pod.Name
	labels[types.KubernetesPodNamespaceLabel] = pod.Namespace
	labels[types.KubernetesPodUIDLabel] = string(pod.UID)

	return labels
}

	for k, v := range parentLabels {
		childLabels[k] = v
	}
	for _, label := range labels.list {
		childLabels[label.key] = label.value
	}
	return context.WithValue(ctx, labelContextKey{}, &childLabels)
}

// Labels takes an even number of strings representing key-value pairs
// and makes a [LabelSet] containing them.
// A label overwrites a prior label with the same key.

// insert records a new label declaration for the current block.
// The label must not have been declared before in any block.
func (b *block) insert(s *ast.LabeledStmt) {
	name := s.Label.Name
	if debug {
		assert(b.gotoTarget(name) == nil)
	}
	labels := b.labels
	if labels == nil {
		labels = make(map[string]*ast.LabeledStmt)
		b.labels = labels
	}
	labels[name] = s
}

// gotoTarget returns the labeled statement in the current

          medium: Memory
        name: istio-envoy
      - emptyDir: {}
        name: istio-data
      - downwardAPI:
          items:
          - fieldRef:
              fieldPath: metadata.labels
            path: labels
          - fieldRef:
              fieldPath: metadata.annotations
            path: annotations
        name: istio-podinfo
      - name: istio-token
        projected:
          sources:

      - emptyDir: {}
        name: istio-data
      - emptyDir: {}
        name: go-proxy-data
      - downwardAPI:
          items:
          - fieldRef:
              fieldPath: metadata.labels
            path: labels
          - fieldRef:
              fieldPath: metadata.annotations
            path: annotations
        name: istio-podinfo
      - name: istio-token
        projected:
          sources:

	revs := sets.New[string]()
	if r, f := wh.Labels[label.IoIstioRev.Name]; f {
		revs.Insert(r)
	}
	for _, webhook := range wh.Webhooks {
		if webhook.NamespaceSelector != nil {
			if r, f := webhook.NamespaceSelector.MatchLabels[label.IoIstioRev.Name]; f {
				revs.Insert(r)
			}

			for _, ls := range webhook.NamespaceSelector.MatchExpressions {
				if ls.Key == label.IoIstioRev.Name {
					revs.InsertAll(ls.Values...)

		}
		return "", false
	}

	// We test the cross product namespace and pod labels:
	// 1. revision label (istio.io/rev)
	// 2. inject label true (istio-injection on namespace, sidecar.istio.io/inject on pod)
	// 3. inject label false
	// 4. inject label true and revision label
	// 5. inject label false and revision label
	// 6. no label

			},
			expected: labels.Instance{},
		},
		{
			name: "region only",
			ctl:  testController{},
			proxy: &model.Proxy{
				Labels: labels.Instance{
					"k1":                       "v1",
					label.TopologyNetwork.Name: "mynetwork",
				},
				Metadata: &model.NodeMetadata{
					Labels: labels.Instance{
						"k1":                       "v1",
						label.TopologyNetwork.Name: "mynetwork",