How to return "undefined" for a specific query arg?

[martpet]

Is my solution the correct way to do it?

endpoints: (build) => ({
  getSomething: build.query<SomeType, string>({
    queryFn(arg, api, extraOptions, baseQuery) {
      if (arg === MY_ARG) {
        return { data: undefined };
      }

      return baseQuery(`/path/${arg}`) as any;
    },
  }),
}),

[phryneas]

undefined is explicitly not allowed. Please use null or something.