What is the best way to mock ember services that use ember-ajax in ember-cli-storybook to post and fetch data?

I'm using Ember CLI Storybook to create a story of a component than internally relies upon services that communicate to the internet, to fetch and post information to the backend. The way I'm doing that is using ember-ajax.

I see how to mock an ember model from this section but wondering if there is a workaround for ember ajax service.