vendor/nelmio/cors-bundle/EventListener/CacheableResponseVaryListener.php line 12
<?phpnamespace Nelmio\CorsBundle\EventListener;use Symfony\Component\HttpKernel\Event\ResponseEvent;/*** When a response is cacheable the `Vary` header has to include `Origin`.*/final class CacheableResponseVaryListener{public function onResponse(ResponseEvent $event){$response = $event->getResponse();if (!$response->isCacheable()) {return;}if (!\in_array('Origin', $response->getVary(), true)) {$response->setVary(array_merge(['Origin'], $response->getVary()));}}}