func (l *Logger) Fatalf(format string, args ...interface{}) {
	l.Output(2, LevelFatal, fmt.Sprintf(format, args...))
	os.Exit(1)
}
func (l *Logger) Fatalf(format string, args ...interface{}) {
	l.Output(2, LevelFatal, fmt.Sprintf(format, args...))
	os.Exit(1)
}
func ( l * Logger ) Fatalf ( format string , args ... interface { } ) { l . Output ( 2 , LevelFatal , fmt . Sprintf ( format , args ... ) ) os . Exit ( 1 ) }
// Fatalf records the log with fatal level and exits
Fatalf records the log with fatal level and exits