func Debugf(format string, args ...interface{}) {
	if Log != nil {
		Log.Debug(fmt.Sprintf(format, args...))
	}
}
func Debugf(format string, args ...interface{}) {
	if Log != nil {
		Log.Debug(fmt.Sprintf(format, args...))
	}
}
// Debugf logs at the DEBUG log level using a standard printf format string