@class NSString, NSObject; @protocol OS_dispatch_queue; @interface ENGroupContextNotifyingObserver : NSObject <ENGroupContextObserverMiddleware> @property (retain, nonatomic) NSObject<OS_dispatch_queue> *queue; @property (copy, nonatomic) id /* block */ onGroupCreate; @property (copy, nonatomic) id /* block */ onGroupCache; @property (copy, nonatomic) id /* block */ onGroupUpdate; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (id)initWithQueue:(id)a0; - (void).cxx_destruct; - (void)groupContext:(id)a0 didCacheGroup:(id)a1; - (void)groupContext:(id)a0 didCreateGroup:(id)a1; - (void)groupContext:(id)a0 didUpdateGroup:(id)a1 withNewGroup:(id)a2; @end