public Builder timeZone(String tz) {
            if (!ClickHouseChecker.isNullOrEmpty(tz)) {
                options.put(ClickHouseClientOption.SERVER_TIME_ZONE.getKey(), tz);
            } else {
                options.remove(ClickHouseClientOption.SERVER_TIME_ZONE.getKey());
            }
            return this;
        }
Sets time zone of this node.

@param tz time zone ID, could be null
@return this builder
clickhouse-client/src/main/java/com/clickhouse/client/ClickHouseNode.java