Github user mengxr commented on the pull request:
https://github.com/apache/spark/pull/8505#issuecomment-135802592
Looking at the changes, I wonder whether we need to annotate original
public methods/variables that have the same since version as the class. Java
doesn't do this
(http://docs.oracle.com/javase/7/docs/api/java/util/Arrays.html). Please don't
remove them now. Just want to discuss and see which approach is more
appropriate.
+ @rxin since this also applies to `DataFrame`.
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