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Sensenmann is able to delete whole libraries independent of programming language due to how the dependencies are defined.

Programming languages would make more of a difference if deletes were happening at a more granular level, e.g. deleting unused functions, but this article doesn't touch on that.

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Yeah unfortunately this means that they are likely missing a lot of unused code. But hey, any dead code deletion is a win

You seem to assume Sensenmann is the only code deletion tool used at Google and/or that it is fully described in the blog post.

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