Description
Returns a reference to default renderer object. You can use this method to save a few keystrokes:
| <?php
$renderer =& $form->defaultRenderer();
?> | 
instead of
| <?php
require_once 'HTML/QuickForm/Renderer/Default.php';
$renderer =& new HTML_QuickForm_Renderer_Default();
?> | 
It is also used internally to implement 
toHtml() and some of the deprecated methods.