This component allows you to personalize the way you present a REST API documentation other than the out of the box one., it uses the Swagger Editor API, and the base for the component was this.

You might have already a style guide for your application so, for you to make use of it you just need to create a new application where you will centralize the documentation for your APIs. To do so add a screen to it, reference the  SwaggerUI widget from SwaggerUI module and drag it to the screen:
  

This widget has only an input parameter for the REST api swagger.json endpoint, you can receive it as input parameter in your screen and pass it over to the widget, this is the result you'll get:

Well, you can, it's not a straight forward approach but it is possible. The way I've used to workaround this was by adding a Redirect rule. I set as base URL the documentation original URL and replace it by the new screen's URL along with the input parameter for the REST api swagger.json endpoint

That's the result:

Enjoy!