Extend Laravel 5's Response Facade to include further helpers?

I'm trying to allow an user to do something like response()->yaml(['their content']);, but I don't understand how I'd go on injecting my YAML method to the response() (ResponseFactory) facade.

Is there any guide that would explain on how to do this? Or maybe a quick description from someone? This is the first time I'm trying to build a package for Laravel and it will also be open source!

I checked out this question, but unfortunately I don't see its use case and I don't think it focuses on adding an additional method which would be called via response().

Help would be highly appreciated.

via Chebli Mohamed