The feature is now ready for review.
JIRA issue HHH-10999, Pull request #1499
It is not 5.1-compatible, because it requires the Session object to be
passed as the WrapperOptions.
One test fails due to bug in core: HHH-11171.
I'm guessing a lot of type descriptors would fail those tests as well.
They've only been presumed to work so far.
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