/**
* Removes from the underlying collection the last
* element returned by this iterator (optional operation).
* This method can be called only once per call to next().
* The behavior of an iterator is unspecified if the underlying
* collection is modified while the iteration is in progress in any
* way other than by calling this method.
* @return boolean
*/
public function remove()
{
if ($this->canRemove) {
$removed = $this->set->remove($this->array[$this->index--]);
$this->array = $this->set->toArray();
$this->canRemove = false;
} else {
throw new IllegalStateException();
}
}
