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

        return $this->addUsingAlias(SkillVersionTableMap::COL_VERSION_COMMENT, $versionComment, $comparison);
    }