Github user holdenk commented on the pull request:
https://github.com/apache/spark/pull/6339#issuecomment-126528382
Ok! If instead of null would it be ok to use option and have the setter set
as Some()? I feel like using an empty array as the default value is pretty
ugly, but I understand if thats not a good enough reason to use an option (even
if we hide it from the user).
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