code: function (text, system, options, persistent) {
                      growl(text, _.extend({
                          header: cultureService.localize('w20.core.notifications.severity.notification'),
                          life: 3000
                      }, _config.options && _config.options.notify || {}, options), 'icon-info-sign', 'jGrowl-info', system);
  
                      if (persistent) {
                          notificationHistoryService.addNotification('info', text);
                      }
                  }
docs: @ngdoc function
  @name w20CoreNotifications.service:NotificationService#notify
  @methodOf w20CoreNotifications.service:NotificationService
  @param {String} text The text to display in the notification
  @param {Boolean} system True if the notification should be a system one, false otherwise.
  @param {Object} options The options object to pass to the underlying implementation (jGrowl).
  @param {Boolean} persistent Should the notification be persisted.
  
  @description
  
  Display a normal notification with the specified parameters.