forM_ bumpedVersions $ \(VersionedTextDocumentIdentifier uri v) ->
modify $ \s ->
let oldVFS = vfs s
- update (VirtualFile oldV t) = VirtualFile (fromMaybe oldV v) t
+ update (VirtualFile oldV t mf) = VirtualFile (fromMaybe oldV v) t mf
newVFS = Map.adjust update uri oldVFS
in s { vfs = newVFS }