Why doesn't the current ApplicationModule have provideNavigator()?

In your post here(http://fernandocejas.com/2015/04/11/tasting-dagger-2-on-android/),
I see the following method in ApplicationModule class but the actual github code doesn't have this method. But what is weird is, this runs even without it.
Can you explain how so? Thanks!

@Provides @Singleton Navigator provideNavigator() {
return new Navigator();
}