Is a Lock File Necessary?

I think it now would be good time to delve abit into the internals of package manager. There's the project code that has import statements, some kind of a manifest file, at least two more components. Next one would be a lock file. A lock file is really the result of aversion selection computation i went through. It means you can walk all the way down through the grapan know that you'll always get the same set of versions.