code: func NewFakeVolumeUtil(deleteShouldFail bool, dirFiles map[string][]*FakeDirEntry) *FakeVolumeUtil {
  	return &FakeVolumeUtil{
  		directoryFiles:   dirFiles,
  		deleteShouldFail: deleteShouldFail,
  	}
  }
docs: // NewFakeVolumeUtil returns a VolumeUtil object for use in unit testing