private function sanitize(array $rows)
    {
        $_documentClass = $this->_documentClass;

        if (isset($this->_options[self::ENTRY_SANITIZE]) && $this->_options[self::ENTRY_SANITIZE]) {
            foreach ($rows as $key => $value) {

                if (is_array($value) && isset($value[$_documentClass::ENTRY_ID])) {
                    unset($rows[$key][$_documentClass::ENTRY_ID]);
                }

                if (is_array($value) && isset($value[$_documentClass::ENTRY_REV])) {
                    unset($rows[$key][$_documentClass::ENTRY_REV]);
                }
            }
        }

        return $rows;
    }