return false;
    }

    return true;
  }

  /**
   * Returns the IPv4 address embedded in an IPv4 compatible address.
   *
   * @param ip {@link Inet6Address} to be examined for an embedded IPv4 address
   * @return {@link Inet4Address} of the embedded IPv4 address
   * @throws IllegalArgumentException if the argument is not a valid IPv4 compatible address
   */

    assertUnicodeEscaping(e, "%F4%8F%BF%BF", '\uDBFF', '\uDFFF');

    assertEquals("", e.escape(""));
    assertEquals("safestring", e.escape("safestring"));
    assertEquals("embedded%00null", e.escape("embedded\0null"));
    assertEquals("max%EF%BF%BFchar", e.escape("max\uffffchar"));
  }

  // Helper to assert common expected behaviour of uri escapers.
  static void assertBasicUrlEscaper(UnicodeEscaper e) {

    assertUnicodeEscaping(e, "%F4%8F%BF%BF", '\uDBFF', '\uDFFF');

    assertEquals("", e.escape(""));
    assertEquals("safestring", e.escape("safestring"));
    assertEquals("embedded%00null", e.escape("embedded\0null"));
    assertEquals("max%EF%BF%BFchar", e.escape("max\uffffchar"));
  }

  // Helper to assert common expected behaviour of uri escapers.
  static void assertBasicUrlEscaper(UnicodeEscaper e) {

    assertUnicodeEscaping(e, "%F4%8F%BF%BF", '\uDBFF', '\uDFFF');

    // simple string tests
    assertEquals("", e.escape(""));
    assertEquals("safestring", e.escape("safestring"));
    assertEquals("embedded%00null", e.escape("embedded\0null"));
    assertEquals("max%EF%BF%BFchar", e.escape("max\uffffchar"));
  }

  /** Tests the various ways that the space character can be handled */
  public void testPlusForSpace() {

    assertUnicodeEscaping(e, "%F4%8F%BF%BF", '\uDBFF', '\uDFFF');

    // simple string tests
    assertEquals("", e.escape(""));
    assertEquals("safestring", e.escape("safestring"));
    assertEquals("embedded%00null", e.escape("embedded\0null"));
    assertEquals("max%EF%BF%BFchar", e.escape("max\uffffchar"));
  }

  /** Tests the various ways that the space character can be handled */
  public void testPlusForSpace() {

    // 2 6to4 addresses differing in the embedded IPv4 address should
    // hash to the different values.
    assertThat(InetAddresses.getCoercedIPv4Address(InetAddresses.forString("2002:0102:0304::1")))
        .isNotEqualTo(
            InetAddresses.getCoercedIPv4Address(InetAddresses.forString("2002:0506:0708::1")));

    // 2 6to4 addresses NOT differing in the embedded IPv4 address should
    // hash to the same value.

   *
   * @since 19.0
   */
  public static final MediaType APPLE_PASSBOOK =
      createConstant(APPLICATION_TYPE, "vnd.apple.pkpass");

  /**
   * <a href="http://en.wikipedia.org/wiki/Embedded_OpenType">Embedded OpenType</a> fonts. This is
   * <a href="http://www.iana.org/assignments/media-types/application/vnd.ms-fontobject">registered
   * </a> with the IANA.
   *
   * @since 17.0
   */

    // 2 6to4 addresses differing in the embedded IPv4 address should
    // hash to the different values.
    assertThat(InetAddresses.getCoercedIPv4Address(InetAddresses.forString("2002:0102:0304::1")))
        .isNotEqualTo(
            InetAddresses.getCoercedIPv4Address(InetAddresses.forString("2002:0506:0708::1")));

    // 2 6to4 addresses NOT differing in the embedded IPv4 address should
    // hash to the same value.

   * The HTTP <a href="https://wicg.github.io/cross-origin-embedder-policy/#COEP">{@code
   * Cross-Origin-Embedder-Policy}</a> header field name.
   *
   * @since 30.0
   */
  public static final String CROSS_ORIGIN_EMBEDDER_POLICY = "Cross-Origin-Embedder-Policy";
  /**
   * The HTTP <a href="https://wicg.github.io/cross-origin-embedder-policy/#COEP-RO">{@code
   * Cross-Origin-Embedder-Policy-Report-Only}</a> header field name.
   *