loadCountries method

Implementation

Future<List<CountryModel>> loadCountries({String assetPath = 'packages/location_picker/assets/country.json'}) async {
  if (_countries != null) return _countries!;

  try {
    final String data = await rootBundle.loadString(assetPath);
    final List<dynamic> jsonList = json.decode(data);
    _countries = jsonList.map((json) => CountryModel.fromJson(json)).toList();
    return _countries!;
  } catch (e) {
    throw Exception('Failed to load countries: $e');
  }
}