code: @Override
      synchronized void offer(TransactionTask task)
      {
          Iv2Trace.logTransactionTaskQueueOffer(task);
          m_backlog.addLast(task);
          taskQueueOffer();
      }
docs: Stick this task in the backlog.
  Many network threads may be racing to reach here, synchronize to
  serialize queue order.
  Always returns true in this case, side effect of extending
  TransactionTaskQueue.