import { languagesSet } from "./some-library.mjs";

// Allowed
languagesSet.keys();
languagesSet.entries();
languagesSet.forEach(l => console.log);
languagesSet.size;
languagesSet.values();

// Will throw TypeError
languagesSet.clear();
languagesSet.add("ja-JP");
languagesSet.delete("en-US");

// Will throw TypeError but I wish it didn't:
languagesSet.has("en-US");