Use friend class.
Use friend class.

planetmarshall/GeographicLib,planetmarshall/GeographicLib,planetmarshall/GeographicLib,planetmarshall/GeographicLib,planetmarshall/GeographicLib,planetmarshall/GeographicLib,planetmarshall/GeographicLib,planetmarshall/GeographicLib,planetmarshall/GeographicLib