code: func parseMAC48s(macs []string) ([]uint64, error) {
  	mac48s := make([]uint64, len(macs))
  	for i, mac := range macs {
  		mac48, err := common.ParseMAC48(mac)
  		if err != nil {
  			return nil, status.Errorf(codes.InvalidArgument, "invalid MAC-48 address %q", mac)
  		}
  		mac48s[i] = uint64(mac48)
  	}
  	return mac48s, nil
  }
docs: // parseMAC48s returns a slice of uint64 MAC addresses.