docs: public boolean isEnlisted()
      {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) SibTr.entry(this, tc, "isEnlisted");
  
          boolean retval = false;
  
          if (_currentTran != null)
          {
              retval = true;
          }
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) SibTr.exit(this, tc, "isEnlisted", "return="+retval);
          return retval;
      }