/**
* Iterator: move pointer to next item
*
* @return void
*/
public function next()
{
if ($this->buffer === null) {
$this->buffer = -2;
// implicitly disable buffering from here on
}
if (!is_array($this->buffer) || $this->position == $this->dataSource->key()) {
$this->dataSource->next();
}
$this->position++;
}
/**
* @return mixed
*/
function key()
{
return $this->_result->key();
}
