+ unsigned int doc_id);
+
+/* querying xapian documents by type (e.g. "mail" or "ghost"): */
+notmuch_status_t
+_notmuch_query_search_documents (notmuch_query_t *query,
+ const char *type,
+ notmuch_messages_t **out);
+
+notmuch_status_t
+_notmuch_query_count_documents (notmuch_query_t *query,
+ const char *type,
+ unsigned *count_out);