@Override
    public ClickHouseNestedValue update(ClickHouseValue value) {
        if (value == null || value.isNullOrEmpty()) {
            return resetToNullOrEmpty();
        } else if (value instanceof ClickHouseNestedValue) {
            set(((ClickHouseNestedValue) value).getValue());
        } else {
            set(new Object[][] { value.asArray() });
        }
        return this;
    }
Gets immutable list of nested columns.

@return immutable list of columns
clickhouse-data/src/main/java/com/clickhouse/data/value/ClickHouseNestedValue.java