text: import {App, Platform, StatusBar} from 'ionic/ionic';
  import {DataService} from './service/data';
  import {AboutPage} from './about/about';
  import {MapPage} from './map/map';
  import {SchedulePage} from './schedule/schedule';
  import {SpeakersPage} from './speakers/speakers';
  
  
  @App({
    templateUrl: 'app/app.html',
    providers: [DataService]
  })
  class ConferenceApp {
    constructor(platform: Platform, data: DataService) {
      // set the root pages for each tab
      this.tab1 = SchedulePage;
      this.tab2 = SpeakersPage;
      this.tab3 = MapPage;
      this.tab4 = AboutPage;
  
      // retrieve the conference data
      data.retrieveData();
  
      // when the platform is ready, set the status bar's style
      platform.ready().then(() => {
        StatusBar.setStyle(StatusBar.DEFAULT);
      });
    }
  
  }
  