+extern int afb_api_ws_add_client(const char *uri, struct afb_apiset *declare_set, struct afb_apiset *call_set, int strong);
+extern int afb_api_ws_add_client_strong(const char *uri, struct afb_apiset *declare_set, struct afb_apiset *call_set);
+extern int afb_api_ws_add_client_weak(const char *uri, struct afb_apiset *declare_set, struct afb_apiset *call_set);