P
Объявление типов:
(new) Program<CounterModel, CounterMsg> Program({required CounterModel model, required View<CounterModel, CounterMsg> Function() view, required Update<CounterModel, CounterMsg> update, List<dynamic Function(Future<void> Function(CounterMsg))>? commands, List<StreamSubscription<dynamic>> Function(Future<void> Function(CounterMsg))? subscriptions})