public static QuerySettings merge(QuerySettings source, QuerySettings override) {
        QuerySettings merged = new QuerySettings();
        if (source != null) {
            merged.rawSettings.putAll(source.rawSettings);
        }
        if (override != null && override != source) {// avoid copying the literally same object
            merged.rawSettings.putAll(override.rawSettings);
        }
        return merged;
    }
Sets the comment that will be added to the query log record associated with the query.
@param logComment - comment to be added to the log
@return same instance of the builder
client-v2/src/main/java/com/clickhouse/client/api/query/QuerySettings.java