code: public synchronized int getUniqueRequestNumber()
      {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "getUniqueRequestNumber");
  
          // Always add two
          requestNumber += 2;
  
          if (requestNumber > Short.MAX_VALUE)
          {
              // Reset the number to 0 for even, or 1 for odd
              requestNumber = requestNumber % 2;
          }
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "getUniqueRequestNumber", "" + requestNumber);
          return requestNumber;
      }
docs: This method will return a unique number that can be used for JFAP exchanges.
  as this can be for ME-ME comms unique number is always increased by two.
  As such, if the initiating peer uses odd request numbers they will always use unique
  numbers.
  
  @return Returns a unique number.