code: func getVolumeDevicePluginDir(specVolID string, host volume.VolumeHost) string {
  	sanitizedSpecVolID := utilstrings.EscapeQualifiedName(specVolID)
  	return filepath.Join(host.GetVolumeDevicePluginDir(CSIPluginName), sanitizedSpecVolID, "dev")
  }
docs: // getVolumeDevicePluginDir returns the path where the CSI plugin keeps the
  // symlink for a block device associated with a given specVolumeID.
  // path: plugins/kubernetes.io/csi/volumeDevices/{specVolumeID}/dev