Values.CountrySourceThe alpha-2 or alpha-3 character code for the country that the results will be present in.
type nonrec t = {code2 : CountryCode2.t option;Country, represented by its alpha 2-character code.
*)code3 : CountryCode3.t option;Country, represented by its alpha t-character code.
*)name : CountryNameString.t option;Name of the country.
*)}