How to make a layered Graphql model?

Question

Node.js

Dear colleagues!
I am studying graphql and here is such a question, I have already learned how to do operations with simple collections, but how to get data from a multilevel collection, now I have such a document in mongodb:

how do I write a model, something like this does not work)

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const componentNavbarSchema = new Schema({
    name: String,
    menu_items: {
        id: String,
        name: String,
        child: String
    }
});

module.exports = mongoose.model('componentNavbar', componentsNavbarSchema);