Just to check what dart returns if there is no key

JsonKey.dart

void main() {
  var data = {'key': 'value'};

  try {
    var value = data['wrongKey'];
    print(value);
    value = data['key'];
    print(value);
    print('---------------');
    //This is just to simulate an error
    print(2 * int.parse(data['error']));
  } catch (_) {
    print('ERROR:');
    print(_);
  }
}