public static IpPrefix valueOf(int address, int prefixLength) {
        return new IpPrefix(IpAddress.valueOf(address), prefixLength);
    }
@Test(expected = IllegalArgumentException.class)
    public void testInvalidValueOfByteArrayTooLongPrefixLengthIPv4() {
        IpPrefix ipPrefix;
        byte[] value;

        value = new byte[] {1, 2, 3, 4};
        ipPrefix = IpPrefix.valueOf(IpAddress.Version.INET, value, 33);
    }