@class NSObject; @protocol OS_dispatch_workloop; @interface PBFWorkloop : NSObject @property (class, readonly, nonatomic) NSObject<OS_dispatch_workloop> *sharedDaemonWorkloop; @property (class, readonly, nonatomic) NSObject<OS_dispatch_workloop> *snapshottingWorkloop; + (id)serialQueueTargetingWorkloop:(id)a0 label:(id)a1 withQoS:(unsigned int)a2; + (id)concurrentQueueTargetingWorkloop:(id)a0 label:(id)a1 withQoS:(unsigned int)a2; + (id)serialQueueTargetingSharedWorkloop:(id)a0; + (id)serialQueueTargetingSharedWorkloop:(id)a0 withQoS:(unsigned int)a1; @end