func (l *Logger) Fatalf(format string, args ...interface{}) {
	l.log(CRITICAL, &format, args...)
	os.Exit(1)
}
func (l *Logger) Fatalf(format string, args ...interface{}) {
	l.log(CRITICAL, &format, args...)
	os.Exit(1)
}
func ( l * Logger ) Fatalf ( format string , args ... interface { } ) { l . log ( CRITICAL , & format , args ... ) os . Exit ( 1 ) }
// Fatalf is equivalent to l.Critical followed by a call to os.Exit(1).
Fatalf is equivalent to l . Critical followed by a call to os . Exit ( 1 ) .