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

        return $this->addUsingAlias(MxmapTableMap::COL_UNLIMITERREQUIRED, $unlimiterrequired, $comparison);
    }