docs: void truncationRequestExistenceCheck() throws KeeperException, InterruptedException {
          loggingLog.info("Checking for existence of snapshot truncation request");
          m_currentTruncationWatcher.cancel();
          m_currentTruncationWatcher = new TruncationRequestExistenceWatcher();
          // TRAIL [TruncSnap:2] checking for zk node existence
          List<String> requests = m_zk.getChildren(VoltZK.request_truncation_snapshot, m_currentTruncationWatcher);
          if (!requests.isEmpty()) {
              loggingLog.info("A truncation request node already existed, processing truncation request event");
              m_currentTruncationWatcher.cancel();
              // TRAIL [TruncSnap:3] fake a node created event (req ZK node already there)
              processTruncationRequestEvent(new WatchedEvent(
                      EventType.NodeChildrenChanged,
                      KeeperState.SyncConnected,
                      VoltZK.request_truncation_snapshot));
          }
      }