vendor/symfony/http-kernel/DependencyInjection/LazyLoadingFragmentHandler.php line 40
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Component\HttpKernel\DependencyInjection;use Psr\Container\ContainerInterface;use Symfony\Component\HttpFoundation\RequestStack;use Symfony\Component\HttpKernel\Controller\ControllerReference;use Symfony\Component\HttpKernel\Fragment\FragmentHandler;/*** Lazily loads fragment renderers from the dependency injection container.** @author Fabien Potencier <fabien@symfony.com>*/class LazyLoadingFragmentHandler extends FragmentHandler{private ContainerInterface $container;/*** @var array<string, bool>*/private array $initialized = [];public function __construct(ContainerInterface $container, RequestStack $requestStack, bool $debug = false){$this->container = $container;parent::__construct($requestStack, [], $debug);}public function render(string|ControllerReference $uri, string $renderer = 'inline', array $options = []): ?string{if (!isset($this->initialized[$renderer]) && $this->container->has($renderer)) {$this->addRenderer($this->container->get($renderer));$this->initialized[$renderer] = true;}return parent::render($uri, $renderer, $options);}}