public static Ip6Prefix valueOf(byte[] address, int prefixLength) {
        return new Ip6Prefix(Ip6Address.valueOf(address), prefixLength);
    }
@Test
    public void testVersion() {
        Ip6Prefix ipPrefix;

        // IPv6
        ipPrefix = Ip6Prefix.valueOf("::/0");
        assertThat(ipPrefix.version(), is(IpAddress.Version.INET6));
    }