code: function asyncResolve(resolveParams, resolveOptions) {
          router.allowPageChange = false;
          if (resolveOptions && resolveOptions.context) {
            if (!route.context) { route.context = resolveOptions.context; }
            else { route.context = Utils.extend({}, route.context, resolveOptions.context); }
            options.route.context = route.context;
          }
          router.loadBack(resolveParams, Utils.extend(options, resolveOptions), true);
        }
docs: Async