return nil, fmt.Errorf("PersistentVolumeController.NewWrapperMounter is not implemented")
}

func (ctrl *PersistentVolumeController) NewWrapperUnmounter(volName string, spec vol.Spec, podUID types.UID) (vol.Unmounter, error) {
	return nil, fmt.Errorf("PersistentVolumeController.NewWrapperMounter is not implemented")
}

	return nil, fmt.Errorf("NewWrapperMounter not supported by expand controller's VolumeHost implementation")
}

func (expc *expandController) NewWrapperUnmounter(volName string, spec volume.Spec, podUID types.UID) (volume.Unmounter, error) {
	return nil, fmt.Errorf("NewWrapperUnmounter not supported by expand controller's VolumeHost implementation")
}

func (expc *expandController) GetMounter(pluginName string) mount.Interface {

	if spec.Volume != nil {
		spec.Volume.Name = wrapperVolumeName
	}

	return kvh.kubelet.newVolumeMounterFromPlugins(&spec, pod, opts)
}

func (kvh *kubeletVolumeHost) NewWrapperUnmounter(volName string, spec volume.Spec, podUID types.UID) (volume.Unmounter, error) {
	// The name of wrapper volume is set to "wrapped_{wrapped_volume_name}"
	wrapperVolumeName := "wrapped_" + volName
	if spec.Volume != nil {

}

func (c *projectedVolumeUnmounter) TearDownAt(dir string) error {
	klog.V(3).Infof("Tearing down volume %v for pod %v at %v", c.volName, c.podUID, dir)

	wrapped, err := c.plugin.host.NewWrapperUnmounter(c.volName, wrappedVolumeSpec(), c.podUID)
	if err != nil {
		return err
	}
	if err = wrapped.TearDownAt(dir); err != nil {
		return err
	}

	c.plugin.deleteServiceAccountToken(c.podUID)

	return nil, fmt.Errorf("NewWrapperMounter not supported by Attach/Detach controller's VolumeHost implementation")
}

func (adc *attachDetachController) NewWrapperUnmounter(volName string, spec volume.Spec, podUID types.UID) (volume.Unmounter, error) {
	return nil, fmt.Errorf("NewWrapperUnmounter not supported by Attach/Detach controller's VolumeHost implementation")
}

func (adc *attachDetachController) GetMounter(pluginName string) mount.Interface {

	}
	plug, err := f.pluginMgr.FindPluginBySpec(&spec)
	if err != nil {
		return nil, err
	}
	return plug.NewMounter(&spec, pod, opts)
}

func (f *fakeVolumeHost) NewWrapperUnmounter(volName string, spec Spec, podUID types.UID) (Unmounter, error) {
	// The name of wrapper volume is set to "wrapped_{wrapped_volume_name}"
	wrapperVolumeName := "wrapped_" + volName
	if spec.Volume != nil {

	NewWrapperMounter(volName string, spec Spec, pod *v1.Pod, opts VolumeOptions) (Mounter, error)

	// NewWrapperUnmounter finds an appropriate plugin with which to handle
	// the provided spec.  See comments on NewWrapperMounter for more
	// context.
	NewWrapperUnmounter(volName string, spec Spec, podUID types.UID) (Unmounter, error)

	// Get mounter interface.
	GetMounter(pluginName string) mount.Interface

	klog.V(3).Infof("Tearing down volume %v for pod %v at %v", volName, podUID, dir)

	// Wrap EmptyDir, let it do the teardown.
	wrapped, err := host.NewWrapperUnmounter(volName, volSpec, podUID)
	if err != nil {
		return err
	}
	return wrapped.TearDownAt(dir)
}

// MountOptionFromSpec extracts and joins mount options from volume spec with supplied options