@class NSObject; @protocol OS_dispatch_queue; @interface FBSDispatchSerialQueue : FBSSerialQueue { NSObject<OS_dispatch_queue> *_queue; BOOL _main; } - (unsigned long long)hash; - (void)performAsync:(id /* block */)a0; - (void)assertBarrierOnQueue; - (void)performAfter:(double)a0 withBlock:(id /* block */)a1; - (id)backingQueueIfExists; - (id)description; - (void).cxx_destruct; - (void)performAsync:(id /* block */)a0 withHandoff:(id)a1; - (BOOL)isEqual:(id)a0; @end