docs: function (message, completeCallback, title, buttonLabel) {
          var _message = (typeof message === 'string' ? message : JSON.stringify(message));
          var _title = (typeof title === 'string' ? title : 'Alert');
          var _buttonLabel = (buttonLabel && typeof buttonLabel === 'string' ? buttonLabel : 'OK');
          exec(completeCallback, null, 'Notification', 'alert', [_message, _title, _buttonLabel]);
      }