Github user srowen commented on the pull request:
https://github.com/apache/spark/pull/3874#issuecomment-68514968
You're right that I think this is too broad. I think I misspoke earlier.
Isn't the theory here that you can bring a later version if Optional with you
in your app? Spark barely uses its API. If your copy of Optional hides the one
in Spark, which is only there to keep the signature the same, is that OK?
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