@interface _SFApplicationExtensionActivity : UIApplicationExtensionActivity @property (copy, nonatomic) id /* block */ customCompletionHandler; - (void).cxx_destruct; - (void)activityDidFinish:(BOOL)a0 items:(id)a1 error:(id)a2; - (BOOL)validateExtensionHasSameContainerAsHostApp:(id)a0; @end