docs: public PersistentTranId getPersistentTranId()
      {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) SibTr.entry(this, tc, "getPersistentTranId");
  
          PersistentTranId ptid = null;
  
          if (_currentTran != null)
          {
              ptid = _currentTran.getPersistentTranId();
          }
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) SibTr.exit(this, tc, "getPersistentTranId", "return="+ptid);
          return ptid;
      }