This is a really interesting application of tooling. Especially since it's cross language, though it sounds like they've punted on strings passed to eval. I'm

This is a really interesting application of tooling. Especially since it's cross language, though it sounds like they've punted on strings passed to eval. I'm curious what stops tests being considered dead and eligible for deletion. If you just excluded the directory called 'test' or similar you'd miss code that is dead other than uses from test code, which is probably a fair approximation to all "dead" code.