public function baseFk($fk)
    {
        if ($fkConfig = FkConfig::get($fk)) {
            return new BaseFk($this->table, $fk, $fkConfig['datatype'], $fkConfig['referenceTable']);
        }

        $class = Config::get('fk_adder.fk_namespace').'\\'.studly_case($fk);

        return new $class($this->table);
    }