/**
* @param AbstractField|Group|Fieldset $element
*
* @return void
*/
private function addErrorClass($element)
{
if ($element instanceof Group || $element instanceof Fieldset) {
foreach ($element->getFields() as $field) {
if ($element instanceof Group || $element instanceof Fieldset) {
$this->addErrorClass($field);
} elseif ($field->isRequired()) {
$field->addClass('has-error');
}
}
} elseif ($element->isRequired()) {
$element->addClass('has-error');
}
}