discourse/app/assets/javascripts/admin/routes/admin_groups_routes.js

/**
  Handles routes for admin groups

  @class AdminGroupsRoute
  @extends Discourse.Route
  @namespace Discourse
  @module Discourse
**/
Discourse.AdminGroupsRoute = Discourse.Route.extend({

  model: function() {
    return Discourse.Group.findAll();
  }

});