anchor.diff:    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) {
  +      if (action is IncrementCounter) {
           state.counter = state.counter + action.counter;
         }
         return state;
  
positive.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(
  
negative.code: /// `flutter create` command to demonstrates the `useReducer` hook.
  ///
  /// First, instead of a StatefulWidget, use a HookWidget instead!
  
  // Create the State
  class State {
  