/**
  * merge a form and add it to current merged forms
  * @see sfForm
  */
 public function mergeForm(sfForm $form)
 {
     parent::mergeForm($form);
     $this->merged_forms[] = $form;
 }
 public function __construct($em, $defaults = array(), $options = array(), $CSRFSecret = null)
 {
     $this->em = $em;
     parent::__construct($defaults, $options, $CSRFSecret);
 }