code: @Override
      public void setRollbackOnly(String globalId) throws SystemException {
  
          final DistributableTransaction tx = getTransactionForID(globalId);
  
          if (tx != null) {
              tx.setRollbackOnly();
          }
      }
docs: /*
  (non-Javadoc)
  
  @see com.ibm.tx.remote.RemoteTransactionController#setRollbackOnly(java.lang.String)