@class NSObject; @protocol OS_dispatch_queue; @interface SLDTaskManager : NSObject @property (readonly, nonatomic) NSObject<OS_dispatch_queue> *serialQueue; - (void).cxx_destruct; - (id)initWithSerialQueue:(id)a0; - (id)startAggregateTask:(id /* block */)a0 withTimeout:(double)a1 cancellationHandler:(id /* block */)a2; - (void)startSubtask:(id /* block */)a0 withProgress:(id)a1 timer:(id)a2; @end