How to use the ionic-angular.ionicBootstrap function in ionic-angular

this.platform.ready().then(() => {
      // Okay, so the platform is ready and our plugins are available.
      // Here you can do any higher level native things you might need.
      StatusBar.styleDefault();
    });
  }

  openPage(page: any) {
    // Reset the content nav to have just this page
    // we wouldn't want the back button to show in this scenario
    this.nav.setRoot(page.component);
  }
  
}

ionicBootstrap(MyApp);

@Component({
  template: '',
})
export class MyApp {
  rootPage: any = HomePage;

  constructor(platform: Platform) {
    platform.ready().then(() => {
      // Okay, so the platform is ready and our plugins are available.
      // Here you can do any higher level native things you might need.
      StatusBar.styleDefault();
    });
  }
}

ionicBootstrap(MyApp);

this.menu.enable(loggedIn, 'loggedInMenu');
    this.menu.enable(!loggedIn, 'loggedOutMenu');
  }
}


// Pass the main App component as the first argument
// Pass any providers for your app in the second argument
// Set any config for your app as the third argument, see the docs for
// more ways to configure your app:
// http://ionicframework.com/docs/v2/api/config/Config/
// Place the tabs on the bottom for all platforms
// See the theming docs for the default values:
// http://ionicframework.com/docs/v2/theming/platform-specific-styles/

ionicBootstrap(ConferenceApp, [ConferenceData, UserData], {
  tabbarPlacement: 'bottom'
});

], ApiDemoPage);
    return ApiDemoPage;
}());
var ApiDemoApp = (function () {
    function ApiDemoApp() {
        this.root = ApiDemoPage;
    }
    ApiDemoApp = __decorate([
        core_1.Component({
            template: ''
        }), 
        __metadata('design:paramtypes', [])
    ], ApiDemoApp);
    return ApiDemoApp;
}());
ionic_angular_1.ionicBootstrap(ApiDemoApp);

}());
var ApiDemoApp = (function () {
    function ApiDemoApp() {
        this.root = ApiDemoPage;
    }
    ApiDemoApp = __decorate([
        core_1.Component({
            template: '',
            styleUrls: ['style.css'],
            encapsulation: core_1.ViewEncapsulation.None
        }), 
        __metadata('design:paramtypes', [])
    ], ApiDemoApp);
    return ApiDemoApp;
}());
ionic_angular_1.ionicBootstrap(ApiDemoApp);

var _a;
}());
exports.PushPage = PushPage;
var ApiDemoApp = (function () {
    function ApiDemoApp() {
        this.root = ApiDemoPage;
    }
    ApiDemoApp = __decorate([
        core_1.Component({
            template: ''
        }), 
        __metadata('design:paramtypes', [])
    ], ApiDemoApp);
    return ApiDemoApp;
}());
ionic_angular_1.ionicBootstrap(ApiDemoApp);

], ApiDemoPage);
    return ApiDemoPage;
}());
var ApiDemoApp = (function () {
    function ApiDemoApp() {
        this.root = ApiDemoPage;
    }
    ApiDemoApp = __decorate([
        core_1.Component({
            template: ''
        }), 
        __metadata('design:paramtypes', [])
    ], ApiDemoApp);
    return ApiDemoApp;
}());
ionic_angular_1.ionicBootstrap(ApiDemoApp);

});
    };
    __decorate([
        core_1.ViewChild(ionic_angular_1.Nav), 
        __metadata('design:type', (typeof (_a = typeof ionic_angular_1.Nav !== 'undefined' && ionic_angular_1.Nav) === 'function' && _a) || Object)
    ], ApiDemoApp.prototype, "nav", void 0);
    ApiDemoApp = __decorate([
        core_1.Component({
            templateUrl: 'app.html'
        }), 
        __metadata('design:paramtypes', [(typeof (_b = typeof ionic_angular_1.Events !== 'undefined' && ionic_angular_1.Events) === 'function' && _b) || Object])
    ], ApiDemoApp);
    return ApiDemoApp;
    var _a, _b;
}());
ionic_angular_1.ionicBootstrap(ApiDemoApp);

var _a;
}());
exports.ApiDemoPage = ApiDemoPage;
var ApiDemoApp = (function () {
    function ApiDemoApp() {
        this.root = ApiDemoPage;
    }
    ApiDemoApp = __decorate([
        core_1.Component({
            template: ''
        }), 
        __metadata('design:paramtypes', [])
    ], ApiDemoApp);
    return ApiDemoApp;
}());
ionic_angular_1.ionicBootstrap(ApiDemoApp);

return ApiDemoPage;
    var _a;
}());
var ApiDemoApp = (function () {
    function ApiDemoApp() {
        this.root = ApiDemoPage;
    }
    ApiDemoApp = __decorate([
        core_1.Component({
            template: ''
        }), 
        __metadata('design:paramtypes', [])
    ], ApiDemoApp);
    return ApiDemoApp;
}());
ionic_angular_1.ionicBootstrap(ApiDemoApp);