public static Ip6Prefix valueOf(byte[] address, int prefixLength) {
        return new Ip6Prefix(Ip6Address.valueOf(address), prefixLength);
    }
@Test(expected = IllegalArgumentException.class)
    public void testInvalidValueOfShortArrayIPv6() {
        Ip6Prefix ipPrefix;
        byte[] value;

        value = new byte[] {1, 2, 3, 4, 5, 6, 7, 8, 9};
        ipPrefix = Ip6Prefix.valueOf(value, 120);
    }