[Zope] Cyclic garbage collection todo 2.9.3 onwards, fixed?

[Jonathan Bowlas]

Hi All,

Could anyone advise whether this has been fixed in any of the Zope versions
beyond v2.9.3:

To-do:
* Add cyclic-garbage collection support to C extension classes, especially
to acquisition wrappers.

I don't see any mention of it at all after Zope 2.9.4 in the changes.txt.

Cheers

Jon