void repodata_merge_some_attrs(Repodata *data, Id dest, Id src, Map *keyidmap, int overwrite);
void repodata_swap_attrs(Repodata *data, Id dest, Id src);
-void repodata_create_stubs(Repodata *data);
-void repodata_join(Repodata *data, Id joinkey);
+Repodata *repodata_create_stubs(Repodata *data);
/*
* load all paged data, used to speed up copying in repo_rpmdb