> * * @implements \RecursiveIterator * * @final since 3.8.0 */ class RecursiveItemIterator extends \IteratorIterator implements \RecursiveIterator { /** * @param \Traversable $iterator */ final public function __construct(\Traversable $iterator) { parent::__construct($iterator); } public function hasChildren(): bool { return 0 < \count($this->current()); } /** * @return RecursiveItemIterator */ #[\ReturnTypeWillChange] public function getChildren() { return new static($this->current()); } }