code: @Override
      public AsnResponse asn(InetAddress ipAddress) throws IOException,
              GeoIp2Exception {
          return this.get(ipAddress, AsnResponse.class, "GeoLite2-ASN");
      }
docs: Look up an IP address in a GeoLite2 ASN database.
  
  @param ipAddress IPv4 or IPv6 address to lookup.
  @return an AsnResponse for the requested IP address.
  @throws GeoIp2Exception if there is an error looking up the IP
  @throws IOException     if there is an IO error