func (g *Glg) Error(val ...interface{}) error {
	return g.out(ERR, blankFormat(len(val)), val...)
}
func (g *Glg) Error(val ...interface{}) error {
	return g.out(ERR, blankFormat(len(val)), val...)
}
func ( g * Glg ) Error ( val ... interface { } ) error { return g . out ( ERR , blankFormat ( len ( val ) ) , val ... ) }
// Error outputs Error log
Error outputs Error log