shared/logger/log.go
func Warnf(format string, args ...interface{}) {
	if Log != nil {
		Log.Warn(fmt.Sprintf(format, args...))
	}
}
func Warnf(format string, args ...interface{}) {
	if Log != nil {
		Log.Warn(fmt.Sprintf(format, args...))
	}
}
// Warnf logs at the WARNING log level using a standard printf format string