Github user afs commented on the pull request:
https://github.com/apache/jena/pull/61#issuecomment-101215479
One possibility is to keep Java8-isms out of Elephas (on a practical basis)
for the moment so backporting to 2.13.0 is a low barrier. Obviously, bug fixes
that go into 3.0.0 and not backported are a potential issue and hard to spot in
all the cleaning. JIRA should help there. My sense is that most fixes have not
been in core/arq which Elephas is reliant on.
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