This is the way, because iterating enums produces odd results due to a bidirectional mapping.
I had always used enums in TS until this year, but union literals are better.
I create my own enums with const objects, compute the type based off the object's values. So very similar this, just with an object as the source instead of an array.
Iterating over an enum in TypeScript always felt like code smell to me because of the filtering code I'd have to write to deal with the bidirectional mapping.
