@class NSString; @interface _NSKVOCompatibility : NSObject <_NSKVOCompatibilityShim> @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; + (void)_noteProcessHasUsedKVOSwiftOverlay; + (BOOL)_releasesObservationBlockOnInvalidation; + (void)_setRequiresSilencingExceptions:(BOOL)a0; @end