code: public void updateAll(Collection<TimelineEvent> events, TimelineUpdater timelineUpdater) {
          if (events != null && !events.isEmpty()) {
              for (TimelineEvent event : events) {
                  update(event, timelineUpdater);
              }
          }
      }
docs: Updates all given events in the model with UI update.
  
  @param events          collection of events to be updated
  @param timelineUpdater TimelineUpdater instance to update the events in UI