Github user ajs6f commented on the pull request:
https://github.com/apache/jena/pull/101#issuecomment-158933847
Maybe there's confusion about what this PR is for-- I wasn't intending that
it would be merged, but that you would use it as a source of examples, like I
wrote. The intention was to show off the various techniques (lambdas, etc.) in
context. You would want to make a PR using whatever you like here. For example,
I show a few uses of `Optional` as the return type of methods that return a
value-or-`null`, but there are many such places.
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