Admin_UserController::treeGetChildsByIdAction PHP Метод

    public function treeGetChildsByIdAction()
    {
        $list = new User\Listing();
        $list->setCondition("parentId = ?", intval($this->getParam("node")));
        $list->setOrder("ASC");
        $list->setOrderKey("name");
        $list->load();
        $users = [];
        if (is_array($list->getUsers())) {
            foreach ($list->getUsers() as $user) {
                if ($user->getId() && $user->getName() != "system") {
                    $users[] = $this->getTreeNodeConfig($user);
                }
            }
        }
        $this->_helper->json($users);
    }