code: @Override
      public DomainResponse domain(InetAddress ipAddress) throws IOException,
              GeoIp2Exception {
          return this
                  .get(ipAddress, DomainResponse.class, "GeoIP2-Domain");
      }
docs: Look up an IP address in a GeoIP2 Domain database.
  
  @param ipAddress IPv4 or IPv6 address to lookup.
  @return a DomainResponse for the requested IP address.
  @throws GeoIp2Exception if there is an error looking up the IP
  @throws IOException     if there is an IO error