hollow/src/main/java/com/netflix/hollow/api/producer/HollowIncrementalProducer.java
public void restoreFromLastState() {
        producer.initializeDataModel(dataModel);
        long latestAnnouncedVersion = announcementWatcher.getLatestVersion();
        if (latestAnnouncedVersion == HollowFilesystemAnnouncementWatcher.NO_ANNOUNCEMENT_AVAILABLE || latestAnnouncedVersion < 0) {
            return;
        }

        restore(latestAnnouncedVersion, blobRetriever);
    }
public void restoreFromLastState() {
        producer.initializeDataModel(dataModel);
        long latestAnnouncedVersion = announcementWatcher.getLatestVersion();
        if (latestAnnouncedVersion == HollowFilesystemAnnouncementWatcher.NO_ANNOUNCEMENT_AVAILABLE || latestAnnouncedVersion < 0) {
            return;
        }

        restore(latestAnnouncedVersion, blobRetriever);
    }
Initializes the data model and restores from existing state.