code: public static Inet6Address anonymizeIpV6Address(Inet6Address inet6Address) {
  		final byte[] address = inet6Address.getAddress();
  		anonymizeLastBytes(address, ANONYMIZED_IPV6_OCTETS);
  		try {
  			return (Inet6Address) InetAddress.getByAddress(address);
  		} catch (UnknownHostException e) {
  			throw new AssertionError(e);
  		}
  	}
docs: Anonymizes IPv6 addresses
  <p>
  The last 80 bits (10 bytes) are set to zero.
  <p>
  This is just like Google Analytics handles IP anonymization: https://support.google.com/analytics/answer/2763052
  
  @param inet6Address the full IPv6 address
  @return the anonymized IP address or null, if the provided ip address is invalid