code: @Override
      public void unexportTransaction(String globalId) throws SystemException {
  
          // look up the tran or just get the one off the thread
  
          // blow up if there's no tran
          final UOWCoordinator uowCoord = _uowc.getUOWCoord();
          if (uowCoord == null || !uowCoord.isGlobal()) {
              throw new SystemException("No global transaction");
          }
  
          // Resume transaction association as we are coming back on server
          ((DistributableTransaction) uowCoord).resumeAssociation();
      }
docs: /*
  (non-Javadoc)
  
  @see com.ibm.tx.remote.RemoteTransactionController#unexportTransaction(java.lang.String)