code: func ShiftFiles(filesToShift []string, uidRange *UidRange) error {
  	if uidRange.Shift != 0 && uidRange.Count != 0 {
  		for _, f := range filesToShift {
  			if err := os.Chown(f, int(uidRange.Shift), int(uidRange.Shift)); err != nil {
  				return err
  			}
  		}
  	}
  	return nil
  }
docs: // ShiftFiles shifts filesToshift by the amounts specified in uidRange