This seems similar to replicating substructural type systems like linear or affine types via interfaces. I can't remember who gave this talk, but a prime examp

This seems similar to replicating substructural type systems like linear or affine types via interfaces. I can't remember who gave this talk, but a prime example is a `File` type. A `File` type shouldn't have a Read() method until the file itself has opened. And calling `Close()` on the File should prevent further reads. Substructural typing - and this pattern - allows you to refine types based off of the type's instance state. There's a ton possible here but I haven't really kept up to date with type systems in the last 5 years. Stuff like this has probably advanced a ton!