+
+/* Returns true if the patch-id of "commit" is present in the set. */
+int has_commit_patch_id(struct commit *commit, struct patch_ids *);
+
+/*
+ * Iterate over all commits in the set whose patch id matches that of
+ * "commit", like:
+ *
+ * struct patch_id *cur;
+ * for (cur = patch_id_iter_first(commit, ids);
+ * cur;
+ * cur = patch_id_iter_next(cur, ids) {
+ * ... look at cur->commit
+ * }
+ */
+struct patch_id *patch_id_iter_first(struct commit *commit, struct patch_ids *);
+struct patch_id *patch_id_iter_next(struct patch_id *cur, struct patch_ids *);