eZ\Publish\Core\REST\Server\Output\ValueObjectVisitor\CachedValue::visit PHP Method

    public function visit(Visitor $visitor, Generator $generator, $data)
    {
        $visitor->visitValueObject($data->value);
        if ($this->getParameter('content.view_cache') !== true) {
            return;
        }
        $response = $visitor->getResponse();
        $response->setPublic();
        $response->setVary('Accept');
        if ($this->getParameter('content.ttl_cache') === true) {
            $response->setSharedMaxAge($this->getParameter('content.default_ttl'));
            $request = $this->getCurrentRequest();
            if (isset($request) && $request->headers->has('X-User-Hash')) {
                $response->setVary('X-User-Hash', false);
            }
        }
        if (isset($data->cacheTags['locationId'])) {
            $visitor->getResponse()->headers->set('X-Location-Id', $data->cacheTags['locationId']);
        }
    }