211     def clone(self, tr, destrevlog, **kwargs):

   211     def clone(self, tr, destrevlog, **kwargs):

   212         if not isinstance(destrevlog, filelog):

   212         if not isinstance(destrevlog, filelog):

   213             raise error.ProgrammingError('expected filelog to clone()')

   213             raise error.ProgrammingError('expected filelog to clone()')

   214 

   214 

   215         return self._revlog.clone(tr, destrevlog._revlog, **kwargs)

   215         return self._revlog.clone(tr, destrevlog._revlog, **kwargs)

   219 

   216 

   220     def _addrevision(self, *args, **kwargs):

   217     def _addrevision(self, *args, **kwargs):

   221         return self._revlog._addrevision(*args, **kwargs)

   218         return self._revlog._addrevision(*args, **kwargs)

   222 

   219 

   223 class narrowfilelog(filelog):

   220 class narrowfilelog(filelog):