Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/3503
Looks good. I would actually like to extend the test by one more, just to
make sure that the proper `ExecutionConfig` is passed (which is not currently
tested - the execution config in the test is null).
A good way to do that would be to create a state of some non-standard type
(like `File`) which goes to Kryo and then check that Kryo has the proper
registration from the execution config.
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