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