Github user marmbrus commented on the pull request:
https://github.com/apache/spark/pull/448#issuecomment-42224442
@kanzhang, Good point about the public APIs. I talked with @pwendell and
we are a little concerned that this.type will make binary computability hard
long term, mostly because we don't understand the bytecode being produced.
Could you possibly run `javap` on some of the RDD classes and let us know what
the function signatures look like for the changed methods?
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