How to use the import-html-entry.importEntry function in import-html-entry

async ({ name: appName }) => {
        await frameworkStartedDefer.promise;

        // 获取入口 html 模板及脚本加载器
        const { template: appContent, execScripts, assetPublicPath } = await importEntry(entry, { fetch });

        // as single-spa load and bootstrap new app parallel with other apps unmounting
        // (see https://github.com/CanopyTax/single-spa/blob/master/src/navigation/reroute.js#L74)
        // we need wait to load the app until all apps are finishing unmount in singular mode
        if (await validateSingularMode(singularMode, app)) {
          await (prevAppUnmountedDeferred && prevAppUnmountedDeferred.promise);
        }
        // 第一次加载设置应用可见区域 dom 结构
        // 确保每次应用加载前容器 dom 结构已经设置完毕
        render({ appContent, loading: true });

        let jsSandbox: Window = window;
        let mountSandbox = () => Promise.resolve();
        let unmountSandbox = () => Promise.resolve();
        if (useJsSandbox) {
          const sandbox = genSandbox(appName, assetPublicPath);

requestIdleCallback(async () => {
    const { getExternalScripts, getExternalStyleSheets } = await importEntry(entry, { fetch });
    requestIdleCallback(getExternalStyleSheets);
    requestIdleCallback(getExternalScripts);
  });
}