isPrivateRequest example

        if (!$response->headers->has('Date')) {
            $response->setDate(\DateTimeImmutable::createFromFormat('U', time()));
        }

        $this->processResponseBody($request, $response);

        if ($this->isPrivateRequest($request) && !$response->headers->hasCacheControlDirective('public')) {
            $response->setPrivate();
        } elseif ($this->options['default_ttl'] > 0 && null === $response->getTtl() && !$response->headers->getCacheControlDirective('must-revalidate')) {
            $response->setTtl($this->options['default_ttl']);
        }

        return $response;
    }

    /** * Checks whether the cache entry is "fresh enough" to satisfy the Request. */
    

        if (!$response->headers->has('Date')) {
            $response->setDate(\DateTimeImmutable::createFromFormat('U', time()));
        }

        $this->processResponseBody($request, $response);

        if ($this->isPrivateRequest($request) && !$response->headers->hasCacheControlDirective('public')) {
            $response->setPrivate();
        } elseif ($this->options['default_ttl'] > 0 && null === $response->getTtl() && !$response->headers->getCacheControlDirective('must-revalidate')) {
            $response->setTtl($this->options['default_ttl']);
        }

        return $response;
    }

    /** * Checks whether the cache entry is "fresh enough" to satisfy the Request. */