anchor.diff:    }
   
     /// [subscribe] returns a stream that will be dispatched whenever the state changes
  -  Stream<State> get subscribe => _stateController.stream;
  +  Stream<StoreChange<State, StateBuilder, dynamic>> get subscribe => _stateController.stream;
   
     /// [state] returns the current state
     State get state => _state;
  
positive.code: import 'middleware.dart';
  import 'typedefs.dart';
  
  /// [Store] is the container of your state.
  class Store<State extends BuiltReducer<State, StateBuilder>,
      StateBuilder extends Builder<State, StateBuilder>, Actions extends ReduxActions> {
    // stream used for dispatching actions
    final StreamController<Action<dynamic>> _dispatch = new StreamController.broadcast();
  
    // stream used to dispatch changes to the state
    final StreamController<State> _stateController = new StreamController.broadcast();
  
    // the current state
    State _state;
  
negative.code:       if (_state == state) return;
  
        // update the internal state and publish the change
        _stateController.add(new StoreChange(state, _state, action));
        _state = state;
      };
  
      // if middleware is give build the chain
  