@class NSString; @interface FBSSerialQueue : NSObject @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; + (id)mainDispatchQueue; + (id)queueWithDispatchQueue:(id)a0; + (id)_queueWithSerialDispatchQueue:(id)a0; + (id)queueWithMainRunLoopModes:(id)a0; - (id)init; - (void)performAsync:(id /* block */)a0; - (void)assertBarrierOnQueue; - (void)performAfter:(double)a0 withBlock:(id /* block */)a1; - (id)backingQueueIfExists; - (void)performAsync:(id /* block */)a0 withHandoff:(id)a1; - (void)assertOnQueue; @end