code: @Override
      public void delist() throws ResourceException {
  
          final boolean isTracingEnabled = TraceComponent.isAnyTracingEnabled();
  
          if (isTracingEnabled && tc.isEntryEnabled())
              Tr.entry(this, tc, "delist", mcWrapper.getUOWCoordinator());
  
          enlisted = false;
  
          if (isTracingEnabled && tc.isEntryEnabled())
              Tr.exit(this, tc, "delist");
  
      }
docs: Delist an XA Resource.
  
  @param flag