category narrows to one of Google's subject areas (0, the default, is all of them) and
disambiguates without a topic id: "jaguar" under Autos is the car. searchProperty picks
the Google surface; the properties are separate indexes, so their values are not comparable
to one another.
Filters every query method accepts.
categorynarrows to one of Google's subject areas (0, the default, is all of them) and disambiguates without a topic id: "jaguar" under Autos is the car.searchPropertypicks the Google surface; the properties are separate indexes, so their values are not comparable to one another.