PhoneNumber.fromJson constructor
Returns a valid PhoneNumber object.
If key
is null
PhoneNumber.key is used to get it's corresponding value in map
.
Throws InvalidValueException if map
's value is not a valid phone number.
Implementation
factory PhoneNumber.fromJson(Map<String, dynamic> map, {String? key}) {
final flatMap = flattenMap(map);
final value = flatMap[key ?? PhoneNumber.key].toString();
return PhoneNumber(value);
}