@class PXUpdater, PXMemoriesSpecManager, NSString; @interface PXStoryMemoryFeedViewLayoutSpecManager : PXFeedViewLayoutSpecManager <PXChangeObserver> @property (readonly, nonatomic) long long layoutKind; @property (readonly, nonatomic) PXMemoriesSpecManager *memoriesSpecManager; @property (readonly, nonatomic) PXUpdater *updater; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (id)init; - (void)observable:(id)a0 didChange:(unsigned long long)a1 context:(void *)a2; - (void)didPerformChanges; - (void)_setNeedsUpdate; - (void).cxx_destruct; - (void)_invalidateSpec; - (void)_updateSpec; - (id)initWithLayoutKind:(long long)a0 extendedTraitCollection:(id)a1; @end