Folder::add

static function add(array $data, ErrorCollection $errorCollection)
{
	/** @var Folder $folder */
	$folder = parent::add($data, $errorCollection);
	if($folder && !$folder->isDeleted())
	{
		$driver = Driver::getInstance();
		$driver->getIndexManager()->indexFolder($folder);
		$driver->sendChangeStatusToSubscribers($folder);
	}

	return $folder;
}