Interface Iterator

`extends`	`Traversable`

Iterator extends Traversable
- Generator implements Iterator
- SeekableIterator extends Iterator
  - ArrayIterator implements SeekableIterator, ArrayAccess, Serializable, Countable
  - SplFileObject implements RecursiveIterator, SeekableIterator
- RecursiveIterator extends Iterator
  - SplFileObject implements RecursiveIterator, SeekableIterator
  - Symfony\Component\Console\Helper\TreeHelper implements RecursiveIterator<int, TreeNode>
- OuterIterator extends Iterator
  - IteratorIterator implements OuterIterator
    - CachingIterator implements ArrayAccess, Countable

Methods
`public`	`current(): mixed` Implemented by `ArrayIterator::current()` `Generator::current()` `SplFileObject::current()` `Symfony\Component\Console\Helper\TreeHelper::current()` `IteratorIterator::current()`	#
`public`	`next(): void` Implemented by `ArrayIterator::next()` `Generator::next()` `SplFileObject::next()` `Symfony\Component\Console\Helper\TreeHelper::next()` `IteratorIterator::next()`	#
`public`	`key(): mixed` Implemented by `ArrayIterator::key()` `Generator::key()` `SplFileObject::key()` `Symfony\Component\Console\Helper\TreeHelper::key()` `IteratorIterator::key()`	#
`public`	`valid(): bool` Implemented by `ArrayIterator::valid()` `Generator::valid()` `SplFileObject::valid()` `Symfony\Component\Console\Helper\TreeHelper::valid()` `IteratorIterator::valid()`	#
`public`	`rewind(): void` Implemented by `ArrayIterator::rewind()` `Generator::rewind()` `SplFileObject::rewind()` `Symfony\Component\Console\Helper\TreeHelper::rewind()` `IteratorIterator::rewind()`	#