@class NSError; @protocol TLTimelineDataSource; @interface TLOperation : NSOperation @property (class, readonly, nonatomic) unsigned long long relativePriority; @property (retain) id<TLTimelineDataSource> dataSource; @property (copy) id /* block */ completionBlock; @property (copy) id /* block */ operationCompletionBlock; @property (readonly) NSError *error; - (id)init; - (void).cxx_destruct; @end