{"TrimRight", []byte{'a'}, "ab", []byte{}},
	{"TrimRight", []byte{'a', 'b'}, "ab", []byte{}},
	{"TrimRight", []byte("☺"), "☺", []byte{}},
	{"TrimPrefix", nil, "", nil},
	{"TrimPrefix", []byte{}, "", []byte{}},
	{"TrimPrefix", []byte{'a'}, "a", []byte{}},
	{"TrimPrefix", []byte("☺"), "☺", []byte{}},
	{"TrimSuffix", nil, "", nil},
	{"TrimSuffix", []byte{}, "", []byte{}},
	{"TrimSuffix", []byte{'a'}, "a", []byte{}},

     *
     * @param text
     *            The text
     * @param prefix
     *            The prefix to remove
     * @return The resulting string
     */
    public static final String trimPrefix(final String text, final String prefix) {
        if (text == null) {
            return null;
        }
        if (prefix == null) {
            return text;
        }
        if (text.startsWith(prefix)) {

func TrimFunc(s []byte, f func(r rune) bool) []byte {
	return TrimRightFunc(TrimLeftFunc(s, f), f)
}

// TrimPrefix returns s without the provided leading prefix string.
// If s doesn't start with prefix, s is returned unchanged.
func TrimPrefix(s, prefix []byte) []byte {
	if HasPrefix(s, prefix) {
		return s[len(prefix):]
	}
	return s
}

		log.Printf("feature: %s", f)
	}
}

func needApproval(filename string) bool {
	name := filepath.Base(filename)
	if name == "go1.txt" {
		return false
	}
	minor := strings.TrimSuffix(strings.TrimPrefix(name, "go1."), ".txt")
	n, err := strconv.Atoi(minor)
	if err != nil {
		log.Fatalf("unexpected api file: %v", name)
	}
	return n >= 19 // started tracking approvals in Go 1.19
}