*
   * @param ip {@link Inet6Address} to be examined for embedded IPv4 client address
   * @return {@code true} if there is an embedded IPv4 client address
   * @since 7.0
   */
  public static boolean hasEmbeddedIPv4ClientAddress(Inet6Address ip) {
    return isCompatIPv4Address(ip) || is6to4Address(ip) || isTeredoAddress(ip);
  }

  /**
   * Examines the Inet6Address to extract the embedded IPv4 client address if the InetAddress is an

    testIp = (Inet6Address) InetAddresses.forString("2001:db8::1");
    assertFalse(InetAddresses.hasEmbeddedIPv4ClientAddress(testIp));

    // Test ISATAP address.
    testIp = (Inet6Address) InetAddresses.forString("2001:db8::5efe:102:304");
    assertFalse(InetAddresses.hasEmbeddedIPv4ClientAddress(testIp));

    // Test compat address.
    testIp = (Inet6Address) InetAddresses.forString("::1.2.3.4");