public function filterByIsCyclic($isCyclic = null, $comparison = null)
    {
        if (is_string($isCyclic)) {
            $isCyclic = in_array(strtolower($isCyclic), array('false', 'off', '-', 'no', 'n', '0', '')) ? false : true;
        }

        return $this->addUsingAlias(SkillVersionTableMap::COL_IS_CYCLIC, $isCyclic, $comparison);
    }