@interface HKCollectionViewLayoutEngineDefaults : NSObject
+ (id)interSectionSpacing;
+ (id)accessibilitySizeThresholdForAdjustedLayout;
+ (struct NSDirectionalEdgeInsets { double x0; double x1; double x2; double x3; })edgeInsetsForWidthDesignation:(long long)a0;
+ (double)interItemSpacingForWidthDesignation:(long long)a0;
+ (double)interRowSpacingForWidthDesignation:(long long)a0;
@end