[Zope] Gadfly commit/abort

I am helping a friend who is using Gadfly. I've looked at the on-line documents but have not found the information I need. The source code site appears to be down... So, here's the problem. Gadfly supports commit and abort (rollback). From python, the interface to these features is via methods applied to the connection object. Our question, how does one commit or rollback Gadfly from DTML. I looked at the Gadflyu DB adaptor, but I couldn't find the functionality. From the Gadfly documentation it appears the SQL 'COMMIT' and 'ROLLBACK' commands are not handled by Gadfly proper. -d