@tfountain See [Zend/Form/Form.php#L513](https://github.com/zendframework/zf2/blob/master/library/Zend/Form/Form.php#L513) and [Zend/Form/Form.php#L353](https://github.com/zendframework/zf2/blob/master/library/Zend/Form/Form.php#L353)