L27:  constructor(
  L28:    private navParams: NavParams,
  L29:    @Inject(forwardRef(() => AuthService ))

L29:    @Inject(forwardRef(() => AuthService ))
  L30:    private authService:AuthService
  L31:  ) {

export class TabsPage {
  ...
  mySelectedIndex: number;
  loggedIn:boolean;
  constructor(
    private navParams: NavParams,
    @Inject(forwardRef(() => AuthService ))
    private authService:AuthService
  ) {
    console.log('TabsPage constructor: navParams.data: ', navParams.data);
    this.loggedIn = authService.authenticated(RootPage.LAUNCHPAD.toString());
    this.mySelectedIndex = navParams.data.tabIndex || 0;
    console.log('Tabs pages: selectedIndex: ' + this.mySelectedIndex);
    console.log('Tabs pages: loggedIn: ' + this.loggedIn);
  }

  isLoggedIn():boolean {
    return this.loggedIn;
  }
}