code: func parseIPv4s(ips []string) ([]int64, error) {
  	ipv4s := make([]int64, len(ips))
  	for i, ip := range ips {
  		ipv4, err := common.ParseIPv4(ip)
  		if err != nil {
  			return nil, status.Errorf(codes.InvalidArgument, "invalid IPv4 address %q", ip)
  		}
  		ipv4s[i] = int64(ipv4)
  	}
  	return ipv4s, nil
  }
docs: // parseIPv4s returns a slice of int64 IP addresses.