code: public static Inet4Address anonymizeIpV4Address(Inet4Address inetAddress) {
  		try {
  			final byte[] address = inetAddress.getAddress();
  			anonymizeLastBytes(address, ANONYMIZED_IPV4_OCTETS);
  			return (Inet4Address) InetAddress.getByAddress(address);
  		} catch (UnknownHostException e) {
  			throw new AssertionError(e);
  		}
  	}
docs: Anonymizes IPv4 addresses
  <p>
  The last octet is set to zero.
  <p>
  This is just like Google Analytics handles IP anonymization: https://support.google.com/analytics/answer/2763052
  
  @param inetAddress the full IPv4 address
  @return the anonymized IP address