public function getDisplayGroup($name)
    {
        if ($group = parent::getDisplayGroup($name)) {
            return $group;
        } else {
            $subforms = $this->getSubForms();
            foreach($subforms as $subform) {
                if ($group = $subform->getDisplayGroup($name)) {
                    return $group;
                }
            }
            return;
        }
    }