Custom watching implementation in knobs can be replaced with `WatchService` [wrapper](https://github.com/functional-streams-for-scala/fs2/blob/fb74ea0bd6438fb63092a3dad6db6b4fdb9ce752/io/src/main/scala/fs2/io/file/Watcher.scala) from fs2.
Custom watching implementation in knobs can be replaced with
WatchServicewrapper from fs2.