200         return self._revlog.indexfile

   200         return self._revlog.indexfile

   201 

   201 

   202     @indexfile.setter

   202     @indexfile.setter

   203     def indexfile(self, value):

   203     def indexfile(self, value):

   204         self._revlog.indexfile = value

   204         self._revlog.indexfile = value

   210 

   205 

   211     # Used by repo upgrade.

   206     # Used by repo upgrade.

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

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

   213         if not isinstance(destrevlog, filelog):

   208         if not isinstance(destrevlog, filelog):

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

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