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