public static ClickHouseBigIntegerValue ofNull(ClickHouseValue ref) {
        return ref instanceof ClickHouseBigIntegerValue
                ? (ClickHouseBigIntegerValue) ((ClickHouseBigIntegerValue) ref).set(null)
                : new ClickHouseBigIntegerValue(null);
    }
Update given value to null or create a new instance if {@code ref} is null.

@param ref object to update, could be null
@return same object as {@code ref} or a new instance if it's null
clickhouse-data/src/main/java/com/clickhouse/data/value/ClickHouseBigIntegerValue.java