Autogenerate GraphQL API Interface

I'm using Apollo to access a GraphQL endpoint. I have the complete schema in a file. Suppose that the schema is as follows:

type Widget {
    widgetId: ID!
    name: String
}

type Query {
    listWidgets: [Widget!]!
}

type Mutation {
    updateWidget(
        widgetId: ID!
        name: String
    ): Widget!
}

I would like to create an API object with an interface like so:

const api = MyApi(endpoint);

const widgets = await api.listWidgets();

const modifiedWidget = await api.updateWidget({
    widgetId: 'myId',
    name: 'My widget',
});

Is there an existing system that does this?

So far the strongest thing I am seeing in my research is graphql-sequelize, which is a graphql database backend for the Sequelize interface, one of Node.js's more popular ORMs currently.