types.go
func (pn PhoneNumber) Local() string {
	num, err := libphonenumber.Parse(string(pn), "US")
	if err != nil {
		return string(pn)
	}
	return libphonenumber.Format(num, libphonenumber.NATIONAL)
}
func (pn PhoneNumber) Local() string {
	num, err := libphonenumber.Parse(string(pn), "US")
	if err != nil {
		return string(pn)
	}
	return libphonenumber.Format(num, libphonenumber.NATIONAL)
}
// Local returns a friendly national representation of the phone number, for
// example, "+14105554092" is returned as "(410) 555-4092". If the phone number
// is not in E.164 format, we try to parse it as a US number. If we cannot
// parse it as a US number, it is returned as is.