[ZODB-Dev] Storage cleanup method

[Thomas Lotze]

Several storage implementations define a cleanup method, which is another
method that is not currently specified by any interface. (The obvious
candidate would be IStorage.)

We have the impression, however, that this method is never called in
production. The only places it is ever called is in ZODB test code. We
couldn't find any call sites neither in ZODB nor Zope application code.
How is this meant to work?

-- 
Thomas