assertEscaping(e, "%C2%80", '\u0080'); // xx-00010,x-000000
    assertEscaping(e, "%DF%BF", '\u07ff'); // xx-11111,x-111111
    assertEscaping(e, "%E0%A0%80", '\u0800'); // xxx-0000,x-100000,x-00,0000
    assertEscaping(e, "%EF%BF%BF", '\uffff'); // xxx-1111,x-111111,x-11,1111
    assertUnicodeEscaping(e, "%F0%90%80%80", '\uD800', '\uDC00');
    assertUnicodeEscaping(e, "%F4%8F%BF%BF", '\uDBFF', '\uDFFF');

    // simple string tests

  public void testStringConverter_convertError() {
    Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
    assertThrows(IllegalArgumentException.class, () -> converter.convert("xxx"));
  }

  @GwtIncompatible // stringConverter
  public void testStringConverter_reverse() {
    Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);

    assertEscaping(e, "%C2%80", '\u0080'); // xx-00010,x-000000
    assertEscaping(e, "%DF%BF", '\u07ff'); // xx-11111,x-111111
    assertEscaping(e, "%E0%A0%80", '\u0800'); // xxx-0000,x-100000,x-00,0000
    assertEscaping(e, "%EF%BF%BF", '\uffff'); // xxx-1111,x-111111,x-11,1111
    assertUnicodeEscaping(e, "%F0%90%80%80", '\uD800', '\uDC00');
    assertUnicodeEscaping(e, "%F4%8F%BF%BF", '\uDBFF', '\uDFFF');

    // simple string tests

                  public SampleElements<Entry<String, Integer>> samples() {
                    return new SampleElements<>(
                        mapEntry("x", 1),
                        mapEntry("xxx", 3),
                        mapEntry("xx", 2),
                        mapEntry("xxxx", 4),
                        mapEntry("aaaaa", 5));
                  }

                  @Override

  public void testStringConverter_convertError() {
    Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
    assertThrows(IllegalArgumentException.class, () -> converter.convert("xxx"));
  }

  @GwtIncompatible // stringConverter
  public void testStringConverter_reverse() {
    Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);

 *
 * <p>One common use of this class is to determine whether a given string is likely to represent an
 * addressable domain on the web -- that is, for a candidate string {@code "xxx"}, might browsing to
 * {@code "http://xxx/"} result in a webpage being displayed? In the past, this test was frequently
 * done by determining whether the domain ended with a {@linkplain #isPublicSuffix() public suffix}

                  public SampleElements<Entry<String, Integer>> samples() {
                    return new SampleElements<>(
                        mapEntry("x", 1),
                        mapEntry("xxx", 3),
                        mapEntry("xx", 2),
                        mapEntry("xxxx", 4),
                        mapEntry("aaaaa", 5));
                  }

                  @Override