The current lookupByCoords returns ``string | null``. Is it correct?  It should be ``ZipCode | null`` ``export function lookupByCoords(lat: number, lon: number): ZipCode | null;``
The current lookupByCoords returns
string | null.Is it correct?
It should be
ZipCode | nullexport function lookupByCoords(lat: number, lon: number): ZipCode | null;