I haven't seen anywhere using the logger.Option.Out for write. Is this variable written here to deceive people?

[hhniao]

as the title
v4.10.2

func (l *defaultLogger) Logf(level Level, format string, v ...interface{}) {
	//	 TODO decide does we need to write message if log level not used?
	if !l.opts.Level.Enabled(level) {
		return
	}

	l.RLock()
	fields := copyFields(l.opts.Fields)
	l.RUnlock()

	fields["level"] = level.String()

	if _, file, line, ok := runtime.Caller(l.opts.CallerSkipCount); ok {
		fields["file"] = fmt.Sprintf("%s:%d", logCallerfilePath(file), line)
	}

	rec := dlog.Record{
		Timestamp: time.Now(),
		Message:   fmt.Sprintf(format, v...),
		Metadata:  make(map[string]string, len(fields)),
	}

	keys := make([]string, 0, len(fields))
	for k, v := range fields {
		keys = append(keys, k)
		rec.Metadata[k] = fmt.Sprintf("%v", v)
	}

	sort.Strings(keys)

	metadata := ""

	for _, k := range keys {
		metadata += fmt.Sprintf(" %s=%v", k, fields[k])
	}

	dlog.DefaultLog.Write(rec)

	t := rec.Timestamp.Format("2006-01-02 15:04:05")
	fmt.Printf("%s %s %v\n", t, metadata, rec.Message)
}