@interface PUViewControllerSpecChange : NSObject @property (readonly, nonatomic) BOOL changed; @property (nonatomic) BOOL traitCollectionChanged; @property (nonatomic) BOOL layoutReferenceSizeChanged; @property (nonatomic) BOOL layoutStyleChanged; @property (nonatomic) BOOL presentedForSecondScreenChanged; @property (nonatomic) BOOL secondScreenSizeChanged; @property (nonatomic) BOOL prefersCompactLayoutForSplitScreenChanged; @end