}

func trimTrace(f string) string {
	for _, trimString := range trimStrings {
		f = strings.TrimPrefix(filepath.ToSlash(f), filepath.ToSlash(trimString))
	}
	return filepath.FromSlash(f)
}

func getSource(level int) string {
	pc, file, lineNumber, ok := runtime.Caller(level)
	if ok {
		// Clean up the common prefixes

		// path cannot be greater than Linux PATH_MAX
		// this is to avoid a busy loop, that can happen
		// if the caller sends path of following style
		// a/a/a/a/a/a/a/a...
		return true
	}
	path = filepath.ToSlash(strings.TrimSpace(path)) // For windows '\' must be converted to '/'
	for _, p := range strings.Split(path, SlashSeparator) {
		switch strings.TrimSpace(p) {
		case dotdotComponent:
			return true
		case dotComponent:

     * 代入可能かどうかを返します。
     *
     * @param toClass
     *            代入先のクラス。{@literal null}であってはいけません
     * @param fromClass
     *            代入元のクラス。{@literal null}であってはいけません
     * @return 代入可能かどうか
     * @see Class#isAssignableFrom(Class)
     */
    public static boolean isAssignableFrom(final Class<?> toClass, Class<?> fromClass) {
        assertArgumentNotNull("toClass", toClass);