finalizers.Insert(finalizer)
		iop.SetFinalizers(sets.SortedList(finalizers))
		err := r.client.Update(context.TODO(), iop)
		if err != nil {
			if errors.IsNotFound(err) {
				scope.Infof("Could not add finalizer to %s: the object was deleted.", iopName)
				metrics.CRDeletionTotal.Increment()
				return reconcile.Result{}, nil
			} else if errors.IsConflict(err) {

		expectedObject runtime.Object
		namespace      string
	}{
		{
			"create -> add finalizer",
			api.SchemeGroupVersion.WithResource("persistentvolumeclaims"),
			claim,
			claimWithFinalizer,
			claim.Namespace,
		},
		{
			"finalizer already exists -> no new finalizer",
			api.SchemeGroupVersion.WithResource("persistentvolumeclaims"),
			claimWithFinalizer,
			claimWithFinalizer,
			claimWithFinalizer.Namespace,
		},

		logger.V(3).Info("Error adding protection finalizer to PV", "PV", klog.KObj(pv), "err", err)
		return err
	}
	logger.V(3).Info("Added protection finalizer to PV", "PV", klog.KObj(pv))
	return nil
}

func (c *Controller) removeFinalizer(ctx context.Context, pv *v1.PersistentVolume) error {
	pvClone := pv.DeepCopy()
	pvClone.ObjectMeta.Finalizers = slice.RemoveString(pvClone.ObjectMeta.Finalizers, volumeutil.PVProtectionFinalizer, nil)

}

// CRDHasFinalizer returns true if the finalizer is in the list.
func CRDHasFinalizer(crd *CustomResourceDefinition, needle string) bool {
	for _, finalizer := range crd.Finalizers {
		if finalizer == needle {
			return true
		}
	}

	return false
}

// CRDRemoveFinalizer removes the finalizer if present.
func CRDRemoveFinalizer(crd *CustomResourceDefinition, needle string) {

    def "detects a cycle with a task that mustRunAfter itself as finalizer of another task"() {
        buildFile << """
            def finalizer = tasks.register("finalizer")
            tasks.named("finalizer").configure {
                mustRunAfter(finalizer)
            }
            task myTask {
                finalizedBy finalizer
            }
        """
        expect:
        2.times {

		wantDelete int
	}{
		"new non-finished Pod with finalizer": {
			newPod: &v1.Pod{
				ObjectMeta: metav1.ObjectMeta{
					Finalizers: []string{batch.JobTrackingFinalizer},
				},
				Status: v1.PodStatus{
					Phase: v1.PodPending,
				},
			},
		},
		"pod with finalizer fails": {
			oldPod: &v1.Pod{
				ObjectMeta: metav1.ObjectMeta{
					Finalizers: []string{batch.JobTrackingFinalizer},
				},

    assertNotNull(getClass().getResource("internal/Finalizer.class"));
  }

  public void testFinalizeClassHasNoNestedClasses() throws Exception {
    // Ensure that the Finalizer class has no nested classes.
    // See https://code.google.com/p/guava-libraries/issues/detail?id=1505
    assertEquals(Collections.emptyList(), Arrays.asList(Finalizer.class.getDeclaredClasses()));
  }

	for i := range namespace.Spec.Finalizers {
		if namespace.Spec.Finalizers[i] != d.finalizerToken {
			finalizerSet.Insert(string(namespace.Spec.Finalizers[i]))
		}
	}
	namespaceFinalize.Spec.Finalizers = make([]v1.FinalizerName, 0, len(finalizerSet))
	for _, value := range finalizerSet.List() {
		namespaceFinalize.Spec.Finalizers = append(namespaceFinalize.Spec.Finalizers, v1.FinalizerName(value))
	}

func IsDeletionCandidate(obj metav1.Object, finalizer string) bool {
	return obj.GetDeletionTimestamp() != nil && slice.ContainsString(obj.GetFinalizers(),
		finalizer, nil)
}

// NeedToAddFinalizer checks if need to add finalizer to object
func NeedToAddFinalizer(obj metav1.Object, finalizer string) bool {
	return obj.GetDeletionTimestamp() == nil && !slice.ContainsString(obj.GetFinalizers(),
		finalizer, nil)

func forEachGC(fn func() bool) {
	type T [32]byte // large enough to avoid runtime's tiny object allocator

	var finalizer func(*T)
	finalizer = func(p *T) {
		if fn() {
			runtime.SetFinalizer(p, finalizer)
		}
	}

	finalizer(new(T))
}

// AdjustStartingHeap modifies GOGC so that GC should not occur until the heap