Github user mt40 commented on the issue:
https://github.com/apache/spark/pull/22309
@cloud-fan while what you said is true, I think it's not that bad. Overall,
the only major special logic is inside the case class `case` and this is due to
the special nature of value class.
On the other side, with value class support, unit testing Spark code with
[ScalaCheck](https://github.com/rickynils/scalacheck) becomes much more easier
which is also the main reason I'm trying to implement this patch.
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