Select transform has non-intuitive semantics

Consider the following schema:

User:

    name: STRING

    location: Location

Location:

    latitude: DOUBLE

    longitude: DOUBLE

If you apply Select.fieldNames("location"), most users expect to get back a row matching the Location schema. Instead you get back an outer schema with a single location field in it. Select should instead unnest the output up to the point where multiple fields are selected.