/**
* @param ActiveField|SetItemInterface $item
* @return string name
* @throws \Exception
*/
protected function getItemName($item)
{
if ($item instanceof ActiveField || $item instanceof InputWidget) {
$name = $item->attribute;
} elseif ($item instanceof SetItemInterface) {
$name = $item->getName();
} else {
throw new \Exception('Unsupported item type');
}
return $name;
}