Angular2找不到名称'AsyncRoutes'和'IdleCallbacks'

Question

我将Angular2 webpack与 WebStorm 一起使用，并参考此示例：

https://github.com/AngularClass/angular2-webpack-starter/blob/master/src/app/app.routes.ts

为什么以下代码有“红色错误提示”

import { WebpackAsyncRoute } from '@angularclass/webpack-toolkit';
import { RouterConfig } from '@angular/router';

export const asyncRoutes: AsyncRoutes = {

      //  **the error prompt is --TS2304 can't find name ' AsyncRoutes'**
    };

    export const prefetchRouteCallbacks: Array<IdleCallbacks> = [

      //   **the error prompt is --TS2304 can't find name 'IdleCallbacks'**
    ];