BooksConfig example

return $this;
    }

    /** * looks for translation in old fashion way * @deprecated The child node "books" at path "translator" is deprecated. */
    public function books(array $value = []): \Symfony\Config\AddToList\Translator\BooksConfig
    {
        if (null === $this->books) {
            $this->_usedProperties['books'] = true;
            $this->books = new \Symfony\Config\AddToList\Translator\BooksConfig($value);
        } elseif (0 < \func_num_args()) {
            throw new InvalidConfigurationException('The node created by "books()" has already been initialized. You cannot pass values the second time you call books().');
        }

        return $this->books;
    }

    public function __construct(array $value = [])
    {
        if (array_key_exists('fallbacks', $value)) {
            $this->_usedProperties['fallbacks'] = true;