How to retrieve campaign information using v1 REST API

I am trying to retrieve information about a specific campaign in a Laravel application that uses the Keap Infusionsoft v1 API, so I’m using Infusionsoft.php and related classes. How do I use the available calls to retrieve all data on a single campaign, including a list of all defined sequences? I’ve looked at the API documentation at Keap REST API, and it doesn’t help. It appears to be talking about direct GET calls to a url, not calls to infusionsoft.php functions.

Thanks for any help you can give me.