code: public void rollbackTransaction() throws MarkLogicTransactionException {
  		if(isActiveTransaction()) {
  			try {
  				sync();
  			} catch (MarkLogicSesameException e) {
  				throw new MarkLogicTransactionException(e);
  			}
  			this.tx.rollback();
  			this.tx = null;
  		}else{
  			throw new MarkLogicTransactionException("No active transaction to rollback.");
  		}
  	}
docs: rollback transaction
  
  @throws MarkLogicTransactionException