docs: private static boolean isComparable(CompleteTransactionTask c1, CompleteTransactionTask c2) {
          return c1.getMsgTxnId() == c2.getMsgTxnId() &&
                  MpRestartSequenceGenerator.isForRestart(c1.getTimestamp()) ==
                  MpRestartSequenceGenerator.isForRestart(c2.getTimestamp());
      }