+ def mark_watched(self, *args, **kwargs):
+ if (self._downloader.params.get('mark_watched', False) and
+ (self._get_login_info()[0] is not None or
+ self._downloader.params.get('cookiefile') is not None)):
+ self._mark_watched(*args, **kwargs)
+
+ def _mark_watched(self, *args, **kwargs):
+ raise NotImplementedError('This method must be implemented by subclasses')
+