@GwtIncompatible // Charset not supported by GWT
  public static final Charset US_ASCII = Charset.forName("US-ASCII");

  /**
   * ISO-8859-1: ISO Latin Alphabet Number 1 (ISO-LATIN-1).
   *
   * <p><b>Java 7+ users:</b> this constant should be treated as deprecated; use {@link
   * java.nio.charset.StandardCharsets#ISO_8859_1} instead.
   *
   */
  public static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");

  /**

  @GwtIncompatible // Charset not supported by GWT
  public static final Charset US_ASCII = Charset.forName("US-ASCII");

  /**
   * ISO-8859-1: ISO Latin Alphabet Number 1 (ISO-LATIN-1).
   *
   * <p><b>Java 7+ users:</b> this constant should be treated as deprecated; use {@link
   * java.nio.charset.StandardCharsets#ISO_8859_1} instead.
   *
   */
  public static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");

  /**

}

// TestLatin1 tests the internal functions for converting to and from Latin-1.
func TestLatin1(t *testing.T) {
	latin1 := []byte{0xc4, 'u', 0xdf, 'e', 'r', 'u', 'n', 'g', 0}
	utf8 := "Äußerung"
	z := Reader{r: bufio.NewReader(bytes.NewReader(latin1))}
	s, err := z.readString()
	if err != nil {
		t.Fatalf("readString: %v", err)
	}
	if s != utf8 {
		t.Fatalf("read latin-1: got %q, want %q", s, utf8)
	}

// GZIP (RFC 1952) specifies that strings are NUL-terminated ISO 8859-1 (Latin-1).
func (z *Writer) writeString(s string) (err error) {
	// GZIP stores Latin-1 strings; error if non-Latin-1; convert if non-ASCII.
	needconv := false
	for _, v := range s {
		if v == 0 || v > 0xff {
			return errors.New("gzip.Write: non-Latin-1 header string")
		}
		if v > 0x7f {
			needconv = true
		}
	}
	if needconv {

	}
	return isExcludingLatin(Letter, r)
}

// IsMark reports whether the rune is a mark character (category [M]).
func IsMark(r rune) bool {
	// There are no mark characters in Latin-1.
	return isExcludingLatin(Mark, r)
}

// IsNumber reports whether the rune is a number (category [N]).
func IsNumber(r rune) bool {
	if uint32(r) <= MaxLatin1 {
		return properties[uint8(r)]&pN != 0
	}

func (z *Reader) Multistream(ok bool) {
	z.multistream = ok
}

// readString reads a NUL-terminated string from z.r.
// It treats the bytes read as being encoded as ISO 8859-1 (Latin-1) and
// will output a string encoded using UTF-8.
// This method always updates z.digest with the data read.
func (z *Reader) readString() (string, error) {
	var err error
	needConv := false
	for i := 0; ; i++ {

     *     <li>the properties are sorted alphabetically</li>
     * </ul>
     *
     * <p>Like with {@link java.util.Properties#store(java.io.OutputStream, String)}, Unicode characters are
     * escaped when using the default Latin-1 (ISO-8559-1) encoding.</p>
     */
    public static void store(Properties properties, OutputStream outputStream, @Nullable String comment, Charset charset, String lineSeparator) throws IOException {
        String rawContents;

		}
	}
}

var surrogateTests = []struct {
	r    rune
	want bool
}{
	// from https://en.wikipedia.org/wiki/UTF-16
	{'\u007A', false},     // LATIN SMALL LETTER Z
	{'\u6C34', false},     // CJK UNIFIED IDEOGRAPH-6C34 (water)
	{'\uFEFF', false},     // Byte Order Mark
	{'\U00010000', false}, // LINEAR B SYLLABLE B008 A (first non-BMP code point)

// cased while not having a mapping.
//
// A common pattern for scripts in the Unicode standard is for upper and lower
// case runes to alternate for increasing rune values (e.g. the accented Latin
// ranges starting from U+0100 and U+1E00 among others and some Cyrillic
// characters). We use this property by defining a cXORCase mode, where the case
// mode (always upper or lower case) is derived from the rune value. As the XOR

 *     <li>the properties are sorted alphabetically</li>
 * </ul>
 *
 * <p>Like with {@link java.util.Properties}, Unicode characters are escaped when using the
 * default Latin-1 (ISO-8559-1) encoding.</p>
 *
 * @see java.util.Properties#store(OutputStream, String)
 * @since 3.3
 */
@CacheableTask
public abstract class WriteProperties extends DefaultTask {