// 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
}

// Provisioner is an interface that creates templates for PersistentVolumes
// and can create the volume as a new resource in the infrastructure provider.

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

// Block volume support
func (fv *FakeVolume) UnmapPodDevice() error {
	fv.Lock()
	defer fv.Unlock()
	fv.UnmapPodDeviceCallCount++
	return nil
}

// Block volume support
func (fv *FakeVolume) GetUnmapPodDeviceCallCount() int {
	fv.RLock()

		return fmt.Errorf("fc: failed to delete the directory: %s\nError: %v", mapPath, err)
	}
	klog.V(4).Infof("fc: successfully detached disk: %s", mapPath)
	return nil
}

func (c *fcDiskUnmapper) UnmapPodDevice() error {
	return nil
}

// GetGlobalMapPath returns global map path and error
// path: plugins/kubernetes.io/{PluginName}/volumeDevices/{WWID}/{podUid}

		return fmt.Errorf("iscsi: failed to delete the directory: %s\nError: %v", mapPath, err)
	}
	klog.V(4).Infof("iscsi: successfully detached disk: %s", mapPath)
	return nil
}

func (c *iscsiDiskUnmapper) UnmapPodDevice() error {
	return nil
}

// GetGlobalMapPath returns global map path and error
// path: plugins/kubernetes.io/{PluginName}/volumeDevices/{ifaceName}/{portal-some_iqn-lun-lun_id}

			return volumetypes.NewOperationContext(eventErr, detailedErr, migrated)
		}

		// Call UnmapPodDevice if blockVolumeUnmapper implements CustomBlockVolumeUnmapper
		if customBlockVolumeUnmapper, ok := blockVolumeUnmapper.(volume.CustomBlockVolumeUnmapper); ok {
			// Execute plugin specific unmap
			unmapErr = customBlockVolumeUnmapper.UnmapPodDevice()
			if unmapErr != nil {
				// On failure, return error. Caller will log and retry.