@class NSString, NSObject; @protocol OS_dispatch_queue; @interface PDCPreflightRequestHandle : NSObject <PDCPreflightRequestCanceling> { struct atomic_flag { _Atomic BOOL _Value; } _isComplete; NSObject<OS_dispatch_queue> *_queue; id /* block */ _completionHandler; } @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; + (id)alreadyCompletedRequestHandle; @end