code: function createLoader(options, fn) {
    var loader = new utils.Loader(options);
    return function() {
      if (!this.isApp) loader.cache = this.views;
      loader.options.loaderFn = fn.bind(this);
      loader.load.apply(loader, arguments);
      return loader.cache;
    };
  }
docs: Create a `Loader` instance with a `loaderfn` bound
  to the app or collection instance.