manager-bundle/src/HttpKernel/ContaoKernel.php
protected function getContainerBuilder(): PluginContainerBuilder
    {
        $container = new PluginContainerBuilder($this->getPluginLoader(), []);
        $container->getParameterBag()->add($this->getKernelParameters());

        if (class_exists(Configuration::class) && class_exists(RuntimeInstantiator::class)) {
            $container->setProxyInstantiator(new RuntimeInstantiator());
        }

        return $container;
    }
protected function getContainerBuilder(): PluginContainerBuilder
    {
        $container = new PluginContainerBuilder($this->getPluginLoader(), []);
        $container->getParameterBag()->add($this->getKernelParameters());

        if (class_exists(Configuration::class) && class_exists(RuntimeInstantiator::class)) {
            $container->setProxyInstantiator(new RuntimeInstantiator());
        }

        return $container;
    }
{@inheritdoc}