private function _getObjectOrigin($id)
    {
        $select = Statement::get(
            'GET_OBJECT_ORIGIN_DATE',
            [
                '@collection' => $this->_name,
                '@id' => $this->_connector->quote($id)
            ]
        );
        $record = $this->_connector->query($select)->fetch();
        return ($record) ? $record['updated'] : null;
    }