@class NSArray, NSLayoutRect;
@protocol NSLayoutItem;
@interface _NSLayoutRectObservable : NSObservationSource {
NSArray *_anchorObservations;
NSLayoutRect *_rectangle;
id<NSLayoutItem> _layoutItem;
}
+ (id)observableForRect:(id)a0 inItem:(id)a1;
- (void)dealloc;
@end