* @return {@code String} containing URI-safe string literal
   */
  public static String toUriString(InetAddress ip) {
    if (ip instanceof Inet6Address) {
      return "[" + toAddrString(ip) + "]";
    }
    return toAddrString(ip);
  }

  /**
   * Returns an InetAddress representing the literal IPv4 or IPv6 host portion of a URL, encoded in
   * the format specified by RFC 3986 section 3.2.2.
   *

    assertThat(InetAddresses.toAddrString(InetAddresses.forString("2001:0:0:4:5:6:7:8")))
        .isEqualTo("2001::4:5:6:7:8");
    assertThat(InetAddresses.toAddrString(InetAddresses.forString("2001:0:3:4:5:6:7:8")))
        .isEqualTo("2001:0:3:4:5:6:7:8");
    assertThat(InetAddresses.toAddrString(InetAddresses.forString("0:0:3:0:0:0:0:ffff")))
        .isEqualTo("0:0:3::ffff");