assertTrue(newIPv4.isIPv4());
        assertFalse(newIPv4.isIPv6());
        assertEquals(WitnessNotification.WitnessIPAddress.IPV4, newIPv4.getFlags());

        // Check IPv6 address
        WitnessNotification.WitnessIPAddress newIPv6 = newAddresses.get(1);
        assertEquals(ipv6, newIPv6.getAddress());
        assertFalse(newIPv6.isIPv4());
        assertTrue(newIPv6.isIPv6());

	// Prints documentation message.
	printObjectAPIMsg()
	if globalIsDistErasure {
		logger.Startup(color.Bold(banner))
	}
}

// Returns true if input is IPv6
func isIPv6(host string) bool {
	h, _, err := net.SplitHostPort(host)
	if err != nil {
		h = host
	}
	ip := net.ParseIP(h)
	return ip.To16() != nil && ip.To4() == nil
}

         *
         * @return true if IPv4
         */
        public boolean isIPv4() {
            return (flags & IPV4) != 0;
        }

        /**
         * Checks if this is an IPv6 address.
         *
         * @return true if IPv6
         */
        public boolean isIPv6() {
            return (flags & IPV6) != 0;
        }
    }

    /**

  private static void checkBigIntegerConversion(String ip, BigInteger bigIntegerIp) {
    InetAddress address = InetAddresses.forString(ip);
    boolean isIpv6 = address instanceof Inet6Address;
    assertThat(InetAddresses.toBigInteger(address)).isEqualTo(bigIntegerIp);
    assertThat(
            isIpv6
                ? InetAddresses.fromIPv6BigInteger(bigIntegerIp)
                : InetAddresses.fromIPv4BigInteger(bigIntegerIp))

     * @return IP address
     */
    public InetAddress getAddress() {
        return address;
    }

    /**
     * Check if this is an IPv6 address
     *
     * @return true if IPv6, false if IPv4
     */
    public boolean isIpv6() {
        return ipv6;
    }

    /**
     * Check if RSS is supported
     *
     * @return true if RSS capable
     */
    public boolean isRssCapable() {

   *     or IPv6 respectively
   */
  private static InetAddress fromBigInteger(BigInteger address, boolean isIpv6) {
    checkArgument(address.signum() >= 0, "BigInteger must be greater than or equal to 0");

    int numBytes = isIpv6 ? 16 : 4;

    byte[] addressBytes = address.toByteArray();
    byte[] targetCopyArray = new byte[numBytes];

        public static final int IPV6 = 0x02;
        
        public WitnessIPAddress(InetAddress address) {
            this.address = address;
            this.flags = address.getAddress().length == 4 ? IPV4 : IPV6;
        }
        
        public InetAddress getAddress() { return address; }
        public int getFlags() { return flags; }
        public boolean isIPv4() { return (flags & IPV4) != 0; }

        NetworkInterfaceInfo info = new NetworkInterfaceInfo(testAddress, 1000);

        assertEquals(testAddress, info.getAddress());
        assertEquals(1000, info.getLinkSpeed());
        assertFalse(info.isIpv6());
        assertEquals(0, info.getCapability());
    }

    @Test
    void testIPv6Constructor() throws UnknownHostException {
        InetAddress ipv6Address = InetAddress.getByName("2001:db8::1");

    enableProtocol(Protocol.HTTP_2)

    val request = Request(server1.url("/"))

    server1.enqueue(refusedStream)
    server2.enqueue(bodyResponse)

    dns[server1.hostName] = listOf(ipv6, ipv4)
    socketFactory[ipv6] = server1.socketAddress
    socketFactory[ipv4] = server2.socketAddress

    client =
      client
        .newBuilder()
        .fastFallback(false)
        .apply {

        // IPv6 with port and path
        InetAddress ipv6 = InetAddress.getByName("::1");
        assertEquals("http://[::1]:8080/sso/metadata", IpAddressUtil.buildUrl("http", ipv6, 8080, "/sso/metadata"));

        // IPv6 with port, no path
        assertEquals("http://[::1]:9200", IpAddressUtil.buildUrl("http", ipv6, 9200, ""));

        // IPv6 without port