docs: public void init(boolean fromBackup) {
          if (!fromBackup && store.isEnabled()) {
              Set<Long> keys = store.loadAllKeys();
              if (keys != null) {
                  long maxId = -1;
                  for (Long key : keys) {
                      QueueItem item = new QueueItem(this, key, null);
                      getItemQueue().offer(item);
                      maxId = Math.max(maxId, key);
                  }
                  idGenerator = maxId + 1;
              }
          }
      }