getCountries function Null safety

Future<List<Country>> getCountries(
  1. BuildContext context
)

This function returns list of countries

Implementation

Future<List<Country>> getCountries(BuildContext context) async {
  String rawData = await DefaultAssetBundle.of(context).loadString(
      'packages/country_calling_code_picker/raw/country_codes.json');
  final parsed = json.decode(rawData.toString()).cast<Map<String, dynamic>>();
  return parsed.map<Country>((json) => new Country.fromJson(json)).toList();
}