char *
ofl_structs_group_desc_stats_to_string(struct ofl_group_desc_stats *s, struct ofl_exp *exp) {
        char *str;
    size_t str_size;
    FILE *stream = open_memstream(&str, &str_size);
    ofl_structs_group_desc_stats_print(stream, s, exp);
    fclose(stream);
    return str;
}
static void
ofl_msg_print_stats_reply_group_desc(struct ofl_msg_multipart_reply_group_desc *msg, FILE *stream, struct ofl_exp *exp) {
    size_t i;

    fprintf(stream, ", stats=[");

    for (i=0; i<msg->stats_num; i++) {
        ofl_structs_group_desc_stats_print(stream, msg->stats[i], exp);
        if (i < msg->stats_num - 1) { fprintf(stream, ", "); };
    }

    fprintf(stream, "]");
}