code: func NewFakeVolumeManager(initialVolumes []v1.UniqueVolumeName) *FakeVolumeManager {
  	volumes := map[v1.UniqueVolumeName]bool{}
  	for _, v := range initialVolumes {
  		volumes[v] = true
  	}
  	return &FakeVolumeManager{
  		volumes:       volumes,
  		reportedInUse: map[v1.UniqueVolumeName]bool{},
  	}
  }
docs: // NewFakeVolumeManager creates a new VolumeManager test instance