type CustomBlockVolumeUnmapper interface {
	BlockVolumeUnmapper
	// TearDownDevice removes traces of the SetUpDevice procedure.
	// If the plugin is non-attachable, this method detaches the volume
	// from a node.
	TearDownDevice(mapPath string, devicePath string) error

	// UnmapPodDevice removes traces of the MapPodDevice procedure.
	UnmapPodDevice() error
}

// Even though iSCSI plugin has attacher/detacher implementation, iSCSI plugin
// needs volume detach operation during TearDownDevice(). This method is only
// chance that operations are done on kubelet node during volume teardown sequences.
func (c *iscsiDiskUnmapper) TearDownDevice(mapPath, _ string) error {
	err := c.manager.DetachBlockISCSIDisk(*c, mapPath)
	if err != nil {

// Populates desiredStateOfWorld cache with one volume/pod.
// Enables controllerAttachDetachEnabled.
// Calls Run()
// Verifies two map path calls are made and no teardownDevice/detach calls.
// Deletes volume/pod from desired state of world.
// Verifies one teardownDevice call is made.
// Verifies there are no attach/detach calls made.
func Test_Run_Positive_VolumeUnmapControllerAttachEnabled(t *testing.T) {
	pod := &v1.Pod{

// If symbolic link isn't there, the device isn't referenced from Pods.
// Call plugin TearDownDevice to clean-up device connection, stored data under
// globalMapPath, these operations depend on plugin implementation.
// Once TearDownDevice is completed, remove globalMapPath dir.
// After globalMapPath is removed, fd lock by loopback for the device can

	deviceUtil util.DeviceUtil
	exec       utilexec.Interface
}

var _ volume.BlockVolumeUnmapper = &fcDiskUnmapper{}
var _ volume.CustomBlockVolumeUnmapper = &fcDiskUnmapper{}

func (c *fcDiskUnmapper) TearDownDevice(mapPath, devicePath string) error {
	err := c.manager.DetachBlockFCDisk(*c, mapPath, devicePath)
	if err != nil {
		return fmt.Errorf("fc: failed to detach disk: %s\nError: %v", mapPath, err)
	}

// Block volume support
func (fv *FakeVolume) GetPodDeviceMapPathCallCount() int {
	fv.RLock()
	defer fv.RUnlock()
	return fv.PodDeviceMapPathCallCount
}

// Block volume support
func (fv *FakeVolume) TearDownDevice(mapPath string, devicePath string) error {
	fv.Lock()
	defer fv.Unlock()
	fv.TearDownDeviceCallCount++
	return nil
}

// Block volume support
func (fv *FakeVolume) GetTearDownDeviceCallCount() int {