private function validateMetadataCache(array $config)
    {
        if (false === $config['enabled']) {
            return $this;
        }

        $this->validateTypeAndService($config, 'as3_modlr.metadata.cache');
        switch ($config['type']) {
            case 'redis':
                $this->validateMetadataCacheRedis($config);
                break;
            default:
                break;
        }
        return $this;
    }