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

        return $this->addUsingAlias(SkillVersionTableMap::COL_IS_ROTATION, $isRotation, $comparison);
    }