@class NSString; @interface FCCKDatabaseQualityOfServiceUpgradingMiddleware : NSObject <FCCKDatabaseOperationMiddleware> @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (long long)database:(id)a0 willEnqueueOperation:(id)a1 error:(id *)a2; @end