@class NSMapTable, EMRemoteConnection, NSXPCInterface; @interface EMActivityRegistry : NSObject { NSMapTable *_observerWrappersByObserver; struct os_unfair_lock_s { unsigned int _os_unfair_lock_opaque; } _lock; } @property (class, readonly) NSXPCInterface *remoteInterface; @property (class, readonly) NSXPCInterface *observerInterface; @property (retain) EMRemoteConnection *connection; - (void).cxx_destruct; - (id)initWithRemoteConnection:(id)a0; - (id)registerActivityObserver:(id)a0; @end