message: chore: update comment on thrown error
diff: @@ -171,7 +171,9 @@ export class Notification<T> {
  : // Unknown kind, return falsy, so we error below.
  0;
  if (!result) {
  - // We might think about removing this check, as the
  + // TODO: consider removing this check. The only way to cause this would be to
  + // use the Notification constructor directly in a way that is not type-safe.
  + // and direct use of the Notification constructor is deprecated.
  throw new TypeError(`Unexpected notification kind ${kind}`);
  }
  return result;
  