Ok, I feel embarrassed that I wasn\'t able to figure this out on my own, but after a few wasted hours, I figured it would be easier to simply ask over here:
I have a bun
It can do.
and Corey is right, files is not class.
Please see below code:
https://script.google.com/d/1QcyrlnwWGdMnJNxJ2X4qfGeM1q75YxJopPuNKUDgOjmqsp4dilLYtC-A/edit