+/* string-map.c */
+typedef struct _notmuch_string_map notmuch_string_map_t;
+typedef struct _notmuch_string_map_iterator notmuch_string_map_iterator_t;
+notmuch_string_map_t *
+_notmuch_string_map_create (const void *ctx);
+
+void
+_notmuch_string_map_append (notmuch_string_map_t *map,
+ const char *key,
+ const char *value);
+
+const char *
+_notmuch_string_map_get (notmuch_string_map_t *map, const char *key);
+
+notmuch_string_map_iterator_t *
+_notmuch_string_map_iterator_create (notmuch_string_map_t *map, const char *key,
+ bool exact);
+
+bool
+_notmuch_string_map_iterator_valid (notmuch_string_map_iterator_t *iter);
+
+void
+_notmuch_string_map_iterator_move_to_next (notmuch_string_map_iterator_t *iter);
+
+const char *
+_notmuch_string_map_iterator_key (notmuch_string_map_iterator_t *iterator);
+
+const char *
+_notmuch_string_map_iterator_value (notmuch_string_map_iterator_t *iterator);
+
+void
+_notmuch_string_map_iterator_destroy (notmuch_string_map_iterator_t *iterator);
+