@class NSArray, NSString, NSObject; @protocol OS_dispatch_queue, CXCallObserverDelegate, CXCallObserverDataSource; @interface CXCallObserver : NSObject <CXCallObserverDataSourceDelegate> @property (weak, nonatomic) id<CXCallObserverDelegate> delegate; @property (retain, nonatomic) NSObject<OS_dispatch_queue> *delegateQueue; @property (readonly, nonatomic) NSObject<OS_dispatch_queue> *concurrentQueue; @property (readonly, nonatomic) id<CXCallObserverDataSource> dataSource; @property (readonly, copy, nonatomic) NSArray *calls; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (id)init; - (void)dealloc; - (void)_performDelegateCallback:(id /* block */)a0; - (id)initWithDataSource:(id)a0 concurrentQueue:(id)a1; - (void)setDelegate:(id)a0 queue:(id)a1; - (void).cxx_destruct; - (void)dataSource:(id)a0 callChanged:(id)a1; @end