docs: void mergeExpiredTransactions(Session session) {
  
          long timestamp = getFirstLiveTransactionTimestamp();
  
          while (true) {
              long     commitTimestamp = 0;
              Object[] actions         = null;
  
              synchronized (committedTransactionTimestamps) {
                  if (committedTransactionTimestamps.isEmpty()) {
                      break;
                  }
  
                  commitTimestamp = committedTransactionTimestamps.getFirst();
  
                  if (commitTimestamp < timestamp) {
                      committedTransactionTimestamps.removeFirst();
  
                      actions = (Object[]) committedTransactions.removeFirst();
                  } else {
                      break;
                  }
              }
  
              mergeTransaction(session, actions, 0, actions.length,
                               commitTimestamp);
              rowActionMapRemoveTransaction(actions, 0, actions.length, true);
          }
      }