+extern "C" {
+extern struct afb_wsj1 *afb_ws_client_connect_wsj1(struct sd_event *eloop, const char *uri, struct afb_wsj1_itf *itf, void *closure);
+extern int afb_wsj1_call_s(struct afb_wsj1 *wsj1, const char *api, const char *verb, const char *object, void (*on_reply)(void *closure, struct afb_wsj1_msg *msg), void *closure);
+extern int afb_wsj1_msg_is_reply_ok(struct afb_wsj1_msg *msg);
+extern int afb_wsj1_send_event_s(struct afb_wsj1 *wsj1, const char *event, const char *object);
+static inline int afb_wsj1_reply_error_s(struct afb_wsj1_msg *msg, const char *object, const char *token);
+}
+