func (g *Glg) Debugf(format string, val ...interface{}) error {
	return g.out(DEBG, format, val...)
}
func (g *Glg) Debugf(format string, val ...interface{}) error {
	return g.out(DEBG, format, val...)
}
func ( g * Glg ) Debugf ( format string , val ... interface { } ) error { return g . out ( DEBG , format , val ... ) }
// Debugf outputs formatted Debug level log
Debugf outputs formatted Debug level log