code: public void processDrsInbound(long localClock) {
          // Is dsrClock timestamp from the remote machine missing
          // or was the CE's timestampls already altered?
          if (drsClock <= 0) {
              return;
          }
          // Adjust timestamps for this machines clock.
          long clockDifference = localClock - drsClock;
          if (expirationTime > 0)
              expirationTime += clockDifference;
          if (timeStamp > 0)
              timeStamp += clockDifference;
          // Don't allow >1 time alter on this CE.
          drsClock = -1;
      }
docs: Handle needed processing after receiving a CE from
  a remote mahine via DRS.
  
  (1) Adjust the timestamps on an incomming
  CE to try and account for clock delta
  between machines.