@class PXStoryModel, PXUpdater, PXStoryViewModeTransition, NSString; @protocol PXStoryViewModeTransitionsHelperDelegate; @interface PXStoryViewModeTransitionsHelper : NSObject <PXChangeObserver> @property (nonatomic) long long presentedViewMode; @property (retain, nonatomic) PXStoryViewModeTransition *currentViewModeTransition; @property (retain, nonatomic) PXStoryViewModeTransition *pendingViewModeTransition; @property (readonly, nonatomic) PXUpdater *updater; @property (readonly, weak, nonatomic) PXStoryModel *model; @property (weak, nonatomic) id<PXStoryViewModeTransitionsHelperDelegate> delegate; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (id)initWithModel:(id)a0; - (id)init; - (void)updateIfNeeded; - (void)observable:(id)a0 didChange:(unsigned long long)a1 context:(void *)a2; - (void)_setNeedsUpdate; - (void).cxx_destruct; - (void)invalidatePresentingGeometry; - (void)_updateTransition; - (void)_invalidateTransitionCompletion; - (void)_configureTransition:(id)a0; - (void)_currentTransitionDidCancel; - (void)_currentTransitionDidFinish; - (void)_invalidateTransition; - (BOOL)_isViewModeSupported:(long long)a0; - (void)_startTransition:(id)a0; - (void)_updateTransitionCompletion; @end