getStateByCode function
Get a state from its code and its belonging country code
Implementation
Future<State?> getStateByCode(
String countryCode,
String stateCode,
) async {
final states = await _loadStates();
final res = states.where((state) {
return state.countryCode == countryCode && state.isoCode == stateCode;
}).toList();
return res.isEmpty ? null : res.first;
}