func Warn(val ...interface{}) error {
	return glg.out(WARN, blankFormat(len(val)), val...)
}
func Warn(val ...interface{}) error {
	return glg.out(WARN, blankFormat(len(val)), val...)
}
func Warn ( val ... interface { } ) error { return glg . out ( WARN , blankFormat ( len ( val ) ) , val ... ) }
// Warn outputs Warn level log
Warn outputs Warn level log