public function entryDataCleanup($entry_id, $data = null)
    {
        $where = is_array($entry_id)
            ? " `entry_id` IN (" . implode(',', $entry_id) . ") "
            : " `entry_id` = '$entry_id' ";

        Symphony::Database()->delete('tbl_entries_data_' . $this->get('id'), $where);

        return true;
    }