(function () {

    "use strict";

    angular.module("progressBarLibServiceModule", [])
           .factory("progressBarLibService", [function () {
               var myProgressBar = ProgressBar;

               // No globals allowed. ProgressBar is only usable through this service.
               ProgressBar = undefined;

               if (myProgressBar === undefined)
                   throw new Error("Progress Bar service is undefined.");

               return myProgressBar;
           }]);

}());