protected function _renderAttributes(FormElement $element, array $custom = null)
{
$attributes = ["name" => $element->getOption('name'), "id" => $element->getOption('id')];
$attributes = array_merge($attributes, (array) $custom, (array) $element->getAttributes());
$return = '';
foreach ($attributes as $k => $v) {
$return .= $v === null ? " {$k}" : " {$k}=\"{$v}\"";
}
return $return;
}
