func (l *Logger) Criticalf(format string, args ...interface{}) {
	l.log(CRITICAL, &format, args...)
}
func (l *Logger) Criticalf(format string, args ...interface{}) {
	l.log(CRITICAL, &format, args...)
}
func ( l * Logger ) Criticalf ( format string , args ... interface { } ) { l . log ( CRITICAL , & format , args ... ) }
// Criticalf logs a message using CRITICAL as log level.
Criticalf logs a message using CRITICAL as log level .