code: func (f *FakeVolumeManager) GetVolumesReportedInUse() []v1.UniqueVolumeName {
  	inuse := []v1.UniqueVolumeName{}
  	for reportedVolume := range f.reportedInUse {
  		inuse = append(inuse, reportedVolume)
  	}
  	return inuse
  }
docs: // GetVolumesReportedInUse is a test function only that returns a list of volumes
  // from the reportedInUse map