protected function _retrieveOne(string $internally, string $graphql, string $class, int $n) // : mixed
    {
        if(isset($this->$internally[$n])) {
            return $this->$internally[$n];
        }
        if(isset($this->def[$graphql][$n])) {
            $class = "\\".__NAMESPACE__."\\".$class;
            return new $class($this->def[$graphql][$n]);
        }
        return new $class();
    }