Azure Automation runbook with custom Python classes in multiple files

I am developing multiple Python classes (in separate files) to be used in a runbook.
Azure DevOps (git) is used as version control with runbooks automatically syncing to Azure Automation.

I know there is a way to include the classes as modules in the environment but I don't want to do that.
Not yet, because I'm still developing those classes.

I could also pull the class files from DevOps separately but I do not want to that either.

Is there any way to include all the files the runbook needs in the runbook run?
My workaround currently is to concatenate all the files in one file, which works but is a bit nasty way of doing this.