* @return {@link Inet4Address} of embedded IPv4 client address
   * @throws IllegalArgumentException if the argument does not have a valid embedded IPv4 address
   */
  public static Inet4Address getEmbeddedIPv4ClientAddress(Inet6Address ip) {
    if (isCompatIPv4Address(ip)) {
      return getCompatIPv4Address(ip);
    }

    if (is6to4Address(ip)) {
      return get6to4IPv4Address(ip);
    }

   * @return {@link Inet4Address} of embedded IPv4 client address
   * @throws IllegalArgumentException if the argument does not have a valid embedded IPv4 address
   */
  public static Inet4Address getEmbeddedIPv4ClientAddress(Inet6Address ip) {
    if (isCompatIPv4Address(ip)) {
      return getCompatIPv4Address(ip);
    }

    if (is6to4Address(ip)) {
      return get6to4IPv4Address(ip);
    }