Github user andrewor14 commented on the pull request:
https://github.com/apache/spark/pull/126#issuecomment-38868993
Looks like we can safely get rid of `BoundedHashMap`. For
`WrappedJavaHashMap`, however, both the existing `TimeStampedHashMap` and the
new `TimeStampedWeakValueHashMap` use it. I'm not sure if we can refactor this
in such a way that allows us to also get rid of `WrappedJavaHashMap` without
having a lot of duplicate code. I'll leave this judgement up to @tdas.
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