This command sets you up completely for using the @ngrx/store. It also allows you to set up feature stores. So, by typing the following two commands, you can generate a whole lot of files:

ng generate module country
ng generate store country

The preceding code will generate a module as well as add a feature state. Running the following command will add the set up needed to work with the store, as well as set up the devtools that come with NgRx:

ng generate store State --root --module app.module.ts