@class NSIndexSet, NSMutableDictionary, NSString, NSMutableSet, UIScrollView, NSObject;
@protocol OS_dispatch_source, PKHorizontalScrollingViewControllerDataSource;

@interface PKHorizontalScrollingViewController : UIViewController <PKHorizontalScrollingViewControllerDelegate, UIScrollViewDelegate, PKHorizontalScrollingViewControllerDataSource> {
    id<PKHorizontalScrollingViewControllerDataSource> _dataSource;
    BOOL _isScrolling;
    BOOL _isDragging;
    BOOL _hasPrefetchedLeft;
    BOOL _hasPrefetchedRight;
    BOOL _isLowEndDevice;
    struct os_unfair_lock_s { unsigned int _os_unfair_lock_opaque; } _lockUpdate;
    NSMutableDictionary *_pendingUpdates;
    NSMutableSet *_unusedViewControllers;
    NSMutableDictionary *_pendingDataCollectionViewUpdates;
    UIScrollView *_scrollView;
    struct CGRect { struct CGPoint { double x; double y; } origin; struct CGSize { double width; double height; } size; } _previousBounds;
    struct CGSize { double width; double height; } _currentSize;
    double _collectionViewVerticalOffset;
    NSObject<OS_dispatch_source> *_scrollTimer;
}

@property (readonly, nonatomic) long long primaryIndex;
@property (readonly, nonatomic) NSIndexSet *visibleIndices;
@property (readonly, nonatomic) NSMutableDictionary *indicesToViewControllerMapping;
@property (readonly, nonatomic) NSMutableDictionary *nonVisibleIndicesToViewControllerMapping;
@property (readonly) unsigned long long hash;
@property (readonly) Class superclass;
@property (readonly, copy) NSString *description;
@property (readonly, copy) NSString *debugDescription;

- (void)_updateScrollViewContentSize;
- (void)scrollViewDidEndDecelerating:(id)a0;
- (id)init;
- (void)viewWillLayoutSubviews;
- (id)footerView;
- (void)viewDidLoad;
- (void)scrollViewDidEndDragging:(id)a0 willDecelerate:(BOOL)a1;
- (long long)numberOfItems;
- (void).cxx_destruct;
- (void)scrollViewDidScroll:(id)a0;
- (void)scrollViewWillBeginDragging:(id)a0;
- (void)scrollViewWillEndDragging:(id)a0 withVelocity:(struct CGPoint { double x0; double x1; })a1 targetContentOffset:(inout struct CGPoint { double x0; double x1; } *)a2;
- (double)_transitionProgress;
- (long long)startingIndex;
- (id)_dequeueViewControllerForIndex:(unsigned long long)a0;
- (BOOL)_canReloadViewControllers;
- (id)_dequeueNonVisibleViewControllerForIndex:(unsigned long long)a0;
- (double)_endOfItemAtIndex:(unsigned long long)a0;
- (unsigned long long)_indexAtContentOffset:(struct CGPoint { double x0; double x1; })a0;
- (void)_layoutCollectionViews;
- (void)_loadDataForContentOffset:(struct CGPoint { double x0; double x1; })a0;
- (unsigned long long)_primaryIndexAtOffset:(struct CGPoint { double x0; double x1; })a0;
- (id)_recoverUnusedViewController;
- (void)_reloadDataForViewControllerAtIndex:(unsigned long long)a0 swap:(BOOL)a1;
- (void)_reloadPendingViewControllers;
- (void)_retireViewControllerForIndex:(unsigned long long)a0;
- (void)_scrollViewStoppedScrolling;
- (double)_startOfItemAtIndex:(unsigned long long)a0;
- (void)_switchPrimaryIndexToIndex:(unsigned long long)a0;
- (void)_updateAlphaDuringTransition;
- (void)_updatePrimaryIndex:(long long)a0;
- (void)_updatePrimaryViewScrolling;
- (id)_visibileIndicesAtContentOffset:(struct CGPoint { double x0; double x1; })a0;
- (double)_yPositionForNonPrimaryViewControllers;
- (id)cachedDataAtIndex:(long long)a0;
- (void)clearPendingDataCollectionViewUpdates;
- (void)didDequeueViewController:(id)a0;
- (void)didMoveToPrimaryIndex:(long long)a0;
- (id)emptyViewControllers;
- (void)enableScrollView:(BOOL)a0;
- (void)fetchDataAtIndex:(long long)a0 completion:(id /* block */)a1;
- (double)footerViewContentHeight;
- (void)horizontalScrollingViewController:(id)a0 scrollViewDidScroll:(id)a1;
- (id)loadingDataObjectWithCurrentData:(id)a0 index:(long long)a1 swap:(BOOL)a2;
- (void)prefetchDataIfNecessary;
- (void)reloadDataForViewControllerAtIndex:(long long)a0 swap:(BOOL)a1;
- (void)resetVisibleViewControllersWithNewPrimaryIndex:(long long)a0;
- (void)updateScrollViewContentOffsetWithNewPrimaryIndex:(long long)a0;

@end