@class NSArray, NSMutableDictionary, NSMutableArray; @interface _UICollectionLayoutDynamicsConfiguration : NSObject { NSMutableArray *_dirtyItems; NSArray *_items; } @property (retain, nonatomic) NSMutableDictionary *behaviorDict; @property (retain, nonatomic) NSArray *dynamicItems; @property (nonatomic) struct CGRect { struct CGPoint { double x; double y; } origin; struct CGSize { double width; double height; } size; } previousVisibleBounds; @property (nonatomic) struct CGRect { struct CGPoint { double x; double y; } origin; struct CGSize { double width; double height; } size; } currentVisibleBounds; - (id)init; - (void)_reset; - (void).cxx_destruct; - (id)_dirtyItems; - (void)_setBehaviors:(id)a0 forItem:(id)a1; - (id)behaviorsForItem:(id)a0; - (void)setBehaviors:(id)a0 forItem:(id)a1; @end