func (l *Logger) Warnln(args ...interface{}) {
	l.Output(2, LevelWarn, fmt.Sprintln(args...))
}
func (l *Logger) Warnln(args ...interface{}) {
	l.Output(2, LevelWarn, fmt.Sprintln(args...))
}
func ( l * Logger ) Warnln ( args ... interface { } ) { l . Output ( 2 , LevelWarn , fmt . Sprintln ( args ... ) ) }
// Warnln records the log with warn level
Warnln records the log with warn level