@class NSString, NSError; @interface _CNFailedFutureImpl : NSObject <CNFutureImpl> { NSError *_error; } @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (id)initWithError:(id)a0; - (void)addFailureBlock:(id /* block */)a0; - (BOOL)isCancelled; - (id)resultBeforeDate:(id)a0 error:(id *)a1; - (BOOL)isFinished; - (void)addSuccessBlock:(id /* block */)a0; - (void)updateDescriptionWithBuilder:(id)a0; - (void).cxx_destruct; - (BOOL)cancel; @end