@class NSTimer, NSObject; @protocol OS_dispatch_queue; @interface SMHeartbeatTimer : NSObject @property (retain, nonatomic) NSTimer *heartbeatTimer; @property (retain, nonatomic) NSObject<OS_dispatch_queue> *queue; - (id)init; - (void).cxx_destruct; - (void)_startHeartbeatForSessionID:(id)a0 handler:(id /* block */)a1; - (void)_stopHeartbeatWithHandler:(id /* block */)a0; - (void)startHeartbeatForSessionID:(id)a0 handler:(id /* block */)a1; - (void)stopHeartbeatWithHandler:(id /* block */)a0; @end