public void add(Statistics stats) {
        if (sealed) {
            throw new IllegalStateException(ERROR_CANNOT_UPDATE);
        }

        Statistics current = this.stats.get();
        this.stats.set(current.add(stats));
    }
Updates query progress.

@param progress query progress, null value will be simply ignored
clickhouse-client/src/main/java/com/clickhouse/client/ClickHouseResponseSummary.java