func (l *Logger) Prefix(lv int) string {
	l.mu.Lock()
	defer l.mu.Unlock()
	return l.out.prefix[lv]
}
// Prefix returns the output prefix for the logger.
Prefix returns the output prefix for the logger.
// Prefix returns the output prefix for the logger .
func (l *Logger) Prefix(lv int) string {
	l.mu.Lock()
	defer l.mu.Unlock()
	return l.out.prefix[lv]
}
func ( l * Logger ) Prefix ( lv int ) string { l . mu . Lock ( ) defer l . mu . Unlock ( ) return l . out . prefix [ lv ] }
Prefix returns the output prefix for the logger.
Prefix returns the output prefix for the logger .