Luau is gradually typed, so as long as you type it strictly (which is a little bit more than just defining the method with colon-notation, but there has been interest in making it simpler), it will catch this.

Unless you're using metatables, this would just be manually defining `self` with a type containing the fields you want it to represent.

For example:

```luau local Module = {} export type Module = { field: string }

function Module.Something(self: Module) print(self.field) end

return Module ```

EDIT: oops, new to this site; expected codeblocks to be a thing :p