func SuccessFunc(f func() string) error {
	if isModeEnable(OK) {
		return glg.out(OK, "%s", f())
	}
	return nil
}
func SuccessFunc(f func() string) error {
	if isModeEnable(OK) {
		return glg.out(OK, "%s", f())
	}
	return nil
}
func SuccessFunc ( f func ( ) string ) error { if isModeEnable ( OK ) { return glg . out ( OK , " " , f ( ) ) } return nil }
// SuccessFunc outputs Success level log returned from the function
SuccessFunc outputs Success level log returned from the function