Method demo

examples/demo.php:1266–1277

(string $type)

class SwitchDemo
{
    public function demo(string $type): void
    {
        switch ($type) {
            case 'reviews':
                $service = new ElasticProductReviewIndexService();
                break;
            case 'brands':
                $service = new ElasticBrandIndexService();
                break;
        }
        $service->index();                // on both classes
    }
}