t.Fatalf("Creating a volume failed with %s expected to pass.", err)
	}

	// Attempt to create a file to verify the permissions later.
	// AppendFile creates file with 0666 perms.
	if err = disk.AppendFile(context.Background(), testCase.volName, pathJoin("hello-world.txt", xlStorageFormatFile), []byte("Hello World")); err != nil {
		t.Fatalf("Create a file `test` failed with %s expected to pass.", err)
	}

    private final AnsiExecutor ansiExecutor;

    public AnsiConsole(Appendable target, Flushable flushable, ColorMap colorMap, ConsoleMetaData consoleMetaData, boolean forceAnsi) {
        this(target, flushable, colorMap, consoleMetaData, new DefaultAnsiFactory(forceAnsi));
    }

    private AnsiConsole(Appendable target, Flushable flushable, ColorMap colorMap, ConsoleMetaData consoleMetaData, AnsiFactory factory) {

	fmt.Println(utf8.ValidString(valid))
	fmt.Println(utf8.ValidString(invalid))
	// Output:
	// true
	// false
}

func ExampleAppendRune() {
	buf1 := utf8.AppendRune(nil, 0x10000)
	buf2 := utf8.AppendRune([]byte("init"), 0x10000)
	fmt.Println(string(buf1))
	fmt.Println(string(buf2))
	// Output:
	// 𐀀
	// init𐀀

	defer os.Remove(name2)
	f.WriteString("bbbbbbbbbb")
	f.Close()

	if err = AppendFile(name1, name2, false); err != nil {
		t.Error(err)
	}

	b, err := os.ReadFile(name1)
	if err != nil {
		t.Error(err)
	}

	expected := "aaaaaaaaaabbbbbbbbbb"
	if string(b) != expected {
		t.Errorf("AppendFile() failed, expected: %s, got %s", expected, string(b))
	}
}

    private final GradleLauncherMetaData delegate;

    public DefaultBuildClientMetaData(GradleLauncherMetaData delegate) {
        this.delegate = delegate;
    }

    @Override
    public void describeCommand(Appendable output, String... args) {
        delegate.describeCommand(output, args);
    }

func (rb *reorderBuffer) decomposeHangul(r rune) {
	r -= hangulBase
	x := r % jamoTCount
	r /= jamoTCount
	rb.appendRune(jamoLBase + r/jamoVCount)
	rb.appendRune(jamoVBase + r%jamoVCount)
	if x != 0 {
		rb.appendRune(jamoTBase + x)
	}
}

// combineHangul algorithmically combines Jamo character components into Hangul.

    }

    public GradleLauncherMetaData(String appName) {
        this.appName = appName;
    }

    public String getAppName() {
        return appName;
    }

    public void describeCommand(Appendable output, String... args) {
        try {
            output.append(appName);
            for (String arg : args) {
                output.append(' ');
                output.append(arg);
            }

			if 'a' <= c && c <= 'z' {
				c -= 'a' - 'A'
			}
			out = append(out, c)
			i++
			continue
		}
		// Handle multi-byte Unicode.
		r, n := utf8.DecodeRune(in[i:])
		out = utf8.AppendRune(out, foldRune(r))
		i += n
	}
	return out
}

// foldRune is returns the smallest rune for all runes in the same fold set.
func foldRune(r rune) rune {
	for {
		r2 := unicode.SimpleFold(r)
		if r2 <= r {

			n += 2
		default:
			a[n] = uint16(replacementChar)
			n++
		}
	}
	return a[:n]
}

// AppendRune appends the UTF-16 encoding of the Unicode code point r
// to the end of p and returns the extended buffer. If the rune is not
// a valid Unicode code point, it appends the encoding of U+FFFD.
func AppendRune(a []uint16, r rune) []uint16 {
	// This function is inlineable for fast handling of ASCII.
	switch {

private final java.util.Properties properties; private final java.io.File propertiesFile; private final Appendable warningOutput; private final WrapperConfiguration config; public static WrapperExecutor forProjectDirectory(java.io.File, Appendable); public static WrapperExecutor forWrapperProperties(java.io.File, Appendable); void WrapperExecutor(java.io.File, java.util.Properties, Appendable); private java.net.URI prepareDistributionU() throws java.net.URISyntaxException; private java.net.URI readDistroUrl()...