如何在OpenCart扩展程序中转换安装/卸载方法

Question

我有3.0 Opencart的有效扩展，我需要将其转换为2.3.0.2。现在，我无法在admin / controller上修复安装/卸载方法

public function install()
    {
        if (!$this->model_setting_event->getEventByCode('travesty_admin_column_left')) {
            $code = "travesty_admin_column_left";
            $trigger = "admin/view/common/column_left/before";
            $action = "extension/module/travesty/menu";
            $this->model_setting_event->addEvent($code, $trigger, $action);

            $code = "travesty_footer";
            $trigger = "catalog/view/common/footer/before";
            $action = "extension/module/travesty/footer";
            $this->model_setting_event->addEvent($code, $trigger, $action);

            $code = "travesty_header";
            $trigger = "catalog/view/common/header/before";
            $action = "extension/module/travesty/header";
            $this->model_setting_event->addEvent($code, $trigger, $action);
        }

    }

    public function uninstall()
    {
        $this->model_setting_event->deleteEventByCode('travesty_admin_column_left');
        $this->model_setting_event->deleteEventByCode('travesty_footer');
        $this->model_setting_event->deleteEventByCode('travesty_header');
    }

根据文档，OpenCart 2.2版提供了可用的事件，那么，我应该怎么改变使其起作用？