private void UnsubscribeFromBus()
 {
     SimpleEventBus.Unsubscribe <PopoverMenuToggled>(OnPopoverMenuToggled);
 }
 private void OnTogglePopoverMenu()
 {
     SimpleEventBus.Publish(new PopoverMenuToggleRequested(true));
     _controller.NavigationItem.SetLeftBarButtonItems(new UIBarButtonItem[0], true);
 }
 private void SubscribeToBus()
 {
     SimpleEventBus.Subscribe <PopoverMenuToggled>(OnPopoverMenuToggled);
 }