static function dumpValues(Form $form)
 {
     return '<h4 onclick="var e = document.getElementById(\'' . $form->getId() . '\'); e.style.display = e.style.display == \'none\' ? \'block\' : \'none\'" style="border-bottom:1px dashed #000;">Dump</h4>' . '<pre id="' . $form->getId() . '">' . print_r($form->export(), true) . '</pre>';
 }