Sails.js + PageDown -- How to call the add-on

Sails.js + PageDown -- How to call the add-on

I want to add Pagedown (Stack Exchange's markdown, installed from npm) to
Sailsjs. I have it properly 'required' in my application.js file, however
I am stumped as to how to use it anywhere outside of said file.
My goal is to use Pagedown either in a controller's action function, or
for a model's beforeUpdate(). Any leads?