Interface Traversable

Traversable
- Iterator extends Traversable
  - RecursiveIterator extends Iterator
    - RecursiveArrayIterator implements RecursiveIterator
  - SeekableIterator extends Iterator
    - ArrayIterator implements SeekableIterator, ArrayAccess, Serializable, Countable
      - RecursiveArrayIterator implements RecursiveIterator
  - OuterIterator extends Iterator
    - RecursiveIteratorIterator implements OuterIterator