If you are looking to introduce types into an untyped codebase, as this project talks about, then you probably don't have a lot of interfaces defined, and if yo

If you are looking to introduce types into an untyped codebase, as this project talks about, then you probably don't have a lot of interfaces defined, and if you do have things in your untyped codebase that are loosely analogous to interfaces from a decoupling standpoint (such as facades and factories) then this approach would advocate those are sensible areas to focus your initial typing efforts.