public function getSubsidiaryClass($name)
    {
        $name = strtolower($name);
        if (array_key_exists($name, $this->subsidiaryMap) && array_key_exists('class', $this->subsidiaryMap[$name])) {
            return class_exists($this->subsidiaryMap[$name]['class']) ? $this->subsidiaryMap[$name]['class'] : null;
        }
        return null;
    }