topic: further "help pytype" by not mentioning remotebranchcache on hg 4.9 Because it doesn't exist. This obviously was a real issue on Mercurial 4.9 because we were trying to directly reference a class that doesn't exist in branchmap module, it wasn't a string in some typing comment or whatever, so this code previously would not work on 4.9 at all. Oops!