Using framework mixins

[karneaud]

Describe the issue with the documentation

I'm trying to understand how to use some of the framework's @mixins and I see there isn't really any documentation on it.

In perusing earlier versions I note you had the generate-class which seems to be deprecated.

If I wanted to create my own custom "one-off" classes( Yes. I know I could just hard code it but experimenting with the framework utilities and configs) using the libraries framework what should I be using?