public function filterByDe($de = null, $comparison = null)
    {
        if (null === $comparison) {
            if (is_array($de)) {
                $comparison = Criteria::IN;
            } elseif (preg_match('/[\%\*]/', $de)) {
                $de = str_replace('*', '%', $de);
                $comparison = Criteria::LIKE;
            }
        }

        return $this->addUsingAlias(CountryPeer::DE, $de, $comparison);
    }