anchor.diff:  /// `flutter create` command to demonstrates the `useReducer` hook.
   ///
   /// First, instead of a StatefulWidget, use a HookWidget instead!
  -
   
   // Create the State
   class State {
  
positive.code:   Widget build(BuildContext context) {
      // Create the reducer function that will handle the actions you dispatch
      State _reducer(State state, IncrementCounter action) {
        if(action is IncrementCounter) {
          state.counter = state.counter + action.counter;
        }
        return state;
  
negative.code:     // Next, invoke the `useReducer` function with the reducer funtion and initial state to create a
      // `_store` variable that contains the current state and dispatch. Whenever the value is
      // changed, this Widget will be rebuilt!
      final _store = useReducer(_reducer, initialState: State());
  
      return Scaffold(
        appBar: AppBar(
  