code: function (options) {
                  var self = this;
                  options = self.getOptions(options);
                  var existing = $('.' + NOTIFICATIONS_CONTAINER_CLASS + ' > div');
                  if (existing) {
                      var diff = existing.length - options.maxNotifications;
                      if (diff >= 0) {
                          for (var i = 0, _i = diff + 1; i < _i; i++) {
                              this.closeNotification(existing[i], -1);
                          }
                      }
                  }
  
                  this.buildNotification(options);
              }
docs: =========== Notification ===========