anchor.diff:    })  : assert(adapter != null),
           assert(dependencies?.adapter == null,
               'Unexpected dependencies.adapter for Adapter.'),
  +        _adapter = adapter,
           super(
             reducer: reducer,
             filter: filter,
  
positive.code:   @override
    ListAdapter buildAdapter(
        T state, Dispatch dispatch, ViewService viewService) {
      final ListAdapter listAdapter = adapter(state, dispatch, viewService);
      return isDebug() ? listAdapter : _beSafeInRelease(listAdapter, dispatch);
    }
  
    static ListAdapter _beSafeInRelease(
        ListAdapter listAdapter, Dispatch dispatch) {
      return ListAdapter(
        (BuildContext context, int index) {
          Widget result;
          try {
            result = listAdapter.itemBuilder(context, index);
          } catch (e, stackTrace) {
            /// The upper layer decides how to consume error.
            // dispatch($DebugOrReportCreator.reportBuildError(e, stackTrace));
            /// todo
  
            result = Container();
          }
          return result;
        },
        listAdapter.itemCount,
      );
    }
  }
  
negative.code: /// abstract for custom extends
  @immutable
  abstract class Adapter<T> extends Logic<T> implements AbstractAdapter<T> {
    final AdapterBuilder<T> _adapter;
  
    AdapterBuilder<T> get protectedAdapter => _adapter;
  
    Adapter({
      @required AdapterBuilder<T> adapter,
      Reducer<T> reducer,
      ReducerFilter<T> filter,
      Effect<T> effect,
  