func IsNetPort(str string) bool {
	if _, err := strconv.ParseUint(
		str, 10, 16); err != nil {
		return false
	}
	return true
}
func IsNetPort(str string) bool {
	if _, err := strconv.ParseUint(
		str, 10, 16); err != nil {
		return false
	}
	return true
}
func IsNetPort ( str string ) bool { if _ , err := strconv . ParseUint ( str , 10 , 16 ) ; err != nil { return false } return true }
// IsNetPort checks if this is a valid net port
IsNetPort checks if this is a valid net port