Reusable block for Spl work.

OuterIteratorMethods.php

<?php
public function getInnerIterator()
{
    return $this->_children;
}

public function current()
{
    return $this->getInnerIterator()->current();
}

public function key()
{
    return $this->getInnerIterator()->key();
}

public function next()
{
    $this->getInnerIterator()->next();
}

public function valid()
{
    return $this->getInnerIterator()->valid();
}

public function rewind()
{
    $this->getInnerIterator()->rewind();
}