public static Inet6Address getByName(CharSequence ip) {
        return getByName(ip, true);
    }
@Test
    public void testInvalidIpv4MappedIp6GetByName() {
        for (String host : invalidIpV4Hosts.keySet()) {
            assertNull(getByName(host, true), host);
        }

        for (String host : invalidIpV6Hosts.keySet()) {
            assertNull(getByName(host, true), host);
        }
    }