- (NSURL *)_URL;
- (NSError *)cancelledErrorWithRequest:(NSURLRequest *)request;
+- (NSError *)fileDoesNotExistErrorWithResponse:(NSURLResponse *)response;
- (BOOL)willUseArchiveForRequest:(NSURLRequest *)r originalURL:(NSURL *)originalURL loader:(WebLoader *)loader;
- (BOOL)archiveLoadPendingForLoader:(WebLoader *)loader;
- (void)deliverArchivedResourcesAfterDelay;