1778
1778
"""Return the graph walker for this repository format"""
1779
1779
parents_provider = self._make_parents_provider()
1780
1780
if (other_repository is not None and
1783
1782
parents_provider = graph._StackedParentsProvider(
1784
1783
[parents_provider, other_repository._make_parents_provider()])
1785
1784
return graph.Graph(parents_provider)