@interface VideosUI.UnifiedMessagingViewModel : VideosUI.ViewModel {
    void /* unknown type, empty encoding */ delegate;
    void /* unknown type, empty encoding */ messageViewController;
    void /* unknown type, empty encoding */ placementId;
    void /* unknown type, empty encoding */ pullForSheetsDuringFetch;
    void /* unknown type, empty encoding */ waitingForFetch;
    void /* unknown type, empty encoding */ hasSetupViewModel;
}

- (void)handleMessageDidUpdateWithNotification:(id)a0;

@end