[Zope-dev] How about load/unload for ZODB residents?

Hi, Maybe I'm dense... but it seems to me that it would be relatively straight forward to allow for an unload routine that is able to create a directory/file structure into which the source is 'unloaded' similar to (what I think I recall exists) the load from a directory routine. I've had problems (need to reconfirm) moving (via export/ import) stuff from one environment to another. Does this type of functionality already exist? (Sorry, been so busy that I haven't read everything that passes through this list). TIA! -ldl