}
	}

	unmounter, err := plug.NewUnmounter("vol1", types.UID("poduid"))
	if err != nil {
		allErrs = append(allErrs,
			fmt.Errorf("failed to make a new Unmounter: %w", err))
		return allErrs
	}
	if unmounter == nil {
		allErrs = append(allErrs,
			fmt.Errorf("got a nil Unmounter"))
		return allErrs
	}

	if err := unmounter.TearDown(); err != nil {
		allErrs = append(allErrs,

	defer func() {
		// Clean up directories if setup fails
		if !setupSuccess {
			unmounter, unmountCreateErr := s.plugin.NewUnmounter(s.volName, s.podUID)
			if unmountCreateErr != nil {
				klog.Errorf("error cleaning up mount %s after failure. Create unmounter failed with %v", s.volName, unmountCreateErr)
				return
			}
			tearDownErr := unmounter.TearDown()
			if tearDownErr != nil {

	defer func() {
		// Clean up directories if setup fails
		if !setupSuccess {
			unmounter, unmountCreateErr := b.plugin.NewUnmounter(b.volName, b.podUID)
			if unmountCreateErr != nil {
				klog.Errorf("error cleaning up mount %s after failure. Create unmounter failed with %v", b.volName, unmountCreateErr)
				return
			}
			tearDownErr := unmounter.TearDown()
			if tearDownErr != nil {

	}

	// load volume info from file
	dir := unmounter.GetPath()
	dataDir := filepath.Dir(dir) // dropoff /mount at end
	data, err := loadVolumeData(dataDir, volDataFileName)
	if err != nil {
		return nil, errors.New(log("unmounter failed to load volume data file [%s]: %v", dir, err))
	}
	unmounter.driverName = csiDriverName(data[volDataKey.driverName])
	unmounter.volumeID = data[volDataKey.volHandle]

		}

		// Either the secret is not mounted because it is named `istio-ca-secret`,
		// or it is `cacerts` secret mounted with "istio-generated" key set.
		caOpts, err = s.createSelfSignedCACertificateOptions(&fileBundle, opts)
		if err != nil {
			return nil, err
		}
		caOpts.OnRootCertUpdate = s.updateRootCertAndGenKeyCert
	} else {
		// The secret is mounted and the "istio-generated" key is not used.

		t.Fatalf("failed to save volume data: %v", err)
	}

	// test unmounter
	unmounter, err := plug.NewUnmounter(pv.ObjectMeta.Name, testPodUID)
	csiUnmounter := unmounter.(*csiMountMgr)

	if err != nil {
		t.Fatalf("Failed to make a new Unmounter: %v", err)
	}

	if csiUnmounter == nil {
		t.Fatal("failed to create CSI Unmounter")
	}

	if csiUnmounter.podUID != testPodUID {
		t.Error("podUID not set")

	// A volume that is both attached and mounted on a node is considered to be used once, not twice.
	// The same rule applies for a unique volume that is shared among multiple pods on the same node.
	// If this field is not specified, then the supported number of volumes on this node is unbounded.
	// +optional
	Count *int32 `json:"count,omitempty" protobuf:"varint,1,opt,name=count"`
}

  // A volume that is both attached and mounted on a node is considered to be used once, not twice.
  // The same rule applies for a unique volume that is shared among multiple pods on the same node.
  // If this field is not specified, then the supported number of volumes on this node is unbounded.
  // +optional
  optional int32 count = 1;

  // A volume that is both attached and mounted on a node is considered to be used once, not twice.
  // The same rule applies for a unique volume that is shared among multiple pods on the same node.
  // If this field is nil, then the supported number of volumes on this node is unbounded.
  // +optional
  optional int32 count = 1;

  // A volume that is both attached and mounted on a node is considered to be used once, not twice.
  // The same rule applies for a unique volume that is shared among multiple pods on the same node.
  // If this field is nil, then the supported number of volumes on this node is unbounded.
  // +optional
  optional int32 count = 1;