+/* returns the last repodata that contains the key */
+Repodata *repo_lookup_repodata(Repo *repo, Id entry, Id keyname);
+Repodata *repo_lookup_repodata_opt(Repo *repo, Id entry, Id keyname);
+Repodata *repo_lookup_filelist_repodata(Repo *repo, Id entry, Datamatcher *matcher);
+