Github user pwendell commented on the pull request:
https://github.com/apache/spark/pull/448#issuecomment-42264759
@marmbrus I did some local byte code inspection and I think it's injecting
this information into the scalasig of the class (in our case, the RDD class). I
made a simple class and ran scalap and javap. To java it looks the same but
scalap can figure it out.
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