internal Core
Interface Traversable
Direct Known Implementers
ArrayIterator, Iterator, IteratorAggregate, IteratorIterator, Nette\ArrayList, Nette\Config\Config, Nette\Finder, Nette\Forms\Rules, Nette\Tokenizer, Nette\Web\Html, Nette\Web\SessionNamespace, OuterIterator, RecursiveIterator, SeekableIterator
Documented at php.net