294             next(iter(self))

   294             next(iter(self))

   295             return True

   295             return True

   296         except StopIteration:

   296         except StopIteration:

   297             return False

   297             return False

   298 

   298 

   299     def __iter__(self):

   301     def __iter__(self):

   300         """Generate the ancestors of _initrevs in reverse topological order.

   302         """Generate the ancestors of _initrevs in reverse topological order.

   301 

   303 

   302         If inclusive is False, yield a sequence of revision numbers starting

   304         If inclusive is False, yield a sequence of revision numbers starting

   303         with the parents of each revision in revs, i.e., each revision is *not*

   305         with the parents of each revision in revs, i.e., each revision is *not*