Interface OuterIterator

`extends`	`Iterator`

OuterIterator extends Iterator
- IteratorIterator implements OuterIterator
  - CachingIterator implements ArrayAccess, Countable

Methods
`public`	`getInnerIterator(): Iterator\|null` Implemented by `IteratorIterator::getInnerIterator()`	#

Methods inherited from Iterator
`current(), next(), key(), valid(), rewind()`