readJson method
Implementation
Future<void> readJson() async {
final String response = await DefaultAssetBundle.of(context)
.loadString('assets/sdk/countries.json');
data = await json.decode(response);
if (createdPayloadSDK.containsKey('country') &&
createdPayloadSDK['country'] != null) {
nationality = getArrayInfo(data, createdPayloadSDK['country'].toString());
} else {
nationality = "";
}
}