code: function () {
      // Create and attach our main view
      this.mainView = new MainView({
        model: this.me,
        el: document.body
      });
  
      // this kicks off our backbutton tracking (browser history)
      // and will cause the first matching handler in the router
      // to fire.
      this.router.history.start({
        root: '/',
        pushState: true
      });
    }
docs: This is where it all starts