fromJsonAsync method
Implementation
@override
Future<T?> fromJsonAsync(json, [dynamic exParam]) async {
ClonableAsyncInterface obj =
await createAsync(json, exParam) as ClonableAsyncInterface;
await obj.beforeDecodeEx(json, exParam);
await obj.setMap(json);
await obj.afterDecodeEx(json, exParam);
return obj as T;
}