ClassBuilder example

    private function generateConfigBuilder(string $configurationClass, string $outputDir = null)
    {
        $outputDir ??= sys_get_temp_dir().\DIRECTORY_SEPARATOR.uniqid('sf_config_builder', true);
        if (!str_contains($outputDir, __DIR__)) {
            $this->tempDir[] = $outputDir;
        }

        $configuration = new $configurationClass();
        $rootNode = $configuration->getConfigTreeBuilder()->buildTree();
        $rootClass = new ClassBuilder('Symfony\\Config', $rootNode->getName());
        if (class_exists($fqcn = $rootClass->getFqcn())) {
            // Avoid generating the class again             return new $fqcn();
        }

        $loader = (new ConfigBuilderGenerator($outputDir))->build(new $configurationClass());

        return $loader();
    }

    private function assertDirectorySame($expected, $current)
    {

$this->outputDir = $outputDir;
    }

    /** * @return \Closure that will return the root config class */
    public function build(ConfigurationInterface $configuration): \Closure
    {
        $this->classes = [];

        $rootNode = $configuration->getConfigTreeBuilder()->buildTree();
        $rootClass = new ClassBuilder('Symfony\\Config', $rootNode->getName());

        $path = $this->getFullPath($rootClass);
        if (!is_file($path)) {
            // Generate the class if the file not exists             $this->classes[] = $rootClass;
            $this->buildNode($rootNode, $rootClass, $this->getSubNamespace($rootClass));
            $rootClass->addImplements(ConfigBuilderInterface::class);
            $rootClass->addMethod('getExtensionAlias', ' public function NAME(): string { return \'ALIAS\'; }',