code: function(controller, appRoutes) {
      if (!appRoutes){ return; }
  
      var routeNames = _.keys(appRoutes).reverse(); // Backbone requires reverted order of routes
  
      _.each(routeNames, function(route) {
        this._addAppRoute(controller, route, appRoutes[route]);
      }, this);
    }
docs: Internal method to process the `appRoutes` for the router, and turn them in to routes that trigger the specified method on the specified `controller`.