Backend method for loading items with isolate

backend_method_for_loading_items_with_isolate.dart

/// Event handler [Events.startLoadingItems]
Future<void> _loadingItems() async {
  _items.clear();
  for (int i = 0; i < 10; i++) {
    _items.addAll(await makeManyRequests(5));
    if (i < (10 - 1)) {
      /// For all requests except the last one - we send only one event
      send(Events.loadingItems);
    } else {
      /// For the last of 10 requests - send a message with data
      send(Events.endLoadingItems, _items);
    }
  }
}