return m->header->version == 2;
}
-int bus_message_seal(sd_bus_message *m, uint64_t serial);
+int bus_message_seal(sd_bus_message *m, uint64_t serial, usec_t timeout);
int bus_message_get_blob(sd_bus_message *m, void **buffer, size_t *sz);
int bus_message_read_strv_extend(sd_bus_message *m, char ***l);