char *
ofl_structs_config_to_string(struct ofl_config *c) {
        char *str;
    size_t str_size;
    FILE *stream = open_memstream(&str, &str_size);
    ofl_structs_config_print(stream, c);
    fclose(stream);
    return str;
}
static void
ofl_msg_print_set_config(struct ofl_msg_set_config *msg, FILE *stream) {
    fprintf(stream, "{conf=");
    ofl_structs_config_print(stream, msg->config);
    fprintf(stream, "}");
}