Different app.component.ts files in sidemenu and tabs ionic starters

In the ionic 2 starters, sidemenu and tabs, why is the syntax of app.component.ts different?

In the sidemenu starter, there’s the method initializeApp, and not in the tabs starter?

Thanks

I Think there’s no different, its just different style of programming, since they both called the same function :

      this.statusBar.styleDefault();
      this.splashScreen.hide();