@protocol PXStoryTimeline; @interface _PXStoryScrollPositionReference : NSObject @property (readonly, nonatomic) id timeline; @property (readonly, nonatomic) struct { long long firstSegmentIdentifier; double secondSegmentMixFactor; long long secondSegmentIdentifier; } scrollPosition; - (id)init; - (void).cxx_destruct; - (id)initWithScrollPosition:(struct { long long x0; double x1; long long x2; })a0; @end