/public/js/app/mixins/CommonMixin.js

// CommonMixin.js
// Shared by model, collection and view
// --------
define(["jquery", "backbone"],

	function($, Backbone) {

		// common setting and functions  
		// such as global event-bus for pubsub
		var Mixin = {
			apiUrl: "api/v1",
			pubsub: _.extend({}, Backbone.Events)
		};

		return Mixin;

	}

);