云引擎可以使用云函数引入第三方库么？

在阅读了定时发邮件的blog后，我想要定期给现有的注册用户发送一些功能介绍的邮件。我想使用云引擎的在线函数测试邮件发送的功能。

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const AV = require("leancloud-storage");
const sgMail = require("@sendgrid/mail");
sgMail.setApiKey(
    "" // 你的 SendGrid API Key
);
const msg = {
    to: 'test@email.com', // Change to your recipient
    from: 'test@sendgrid.com', // Change to your verified sender
    subject: 'Sending with SendGrid is Fun',
    text: 'and easy to do anywhere, even with Node.js',
    html: '<strong>and easy to do anywhere, even with Node.js</strong>',
}
sgMail
    .send(msg)
    .then((resp) => {
        return resp;
    })
    .catch((error) => {
        return error;
    })

但是因为需要引入@sendgrid/mail，运行时报错。Cannot find module '@sendgrid/mail' [500 POST /functions/emailTest]。请问在线编辑是无法引入第三方包么？只可以本地编写然后部署么？