public static CLLocationCoordinate2D MapPointInterpolate(MapPoint a, MapPoint b, double t) => _MapPointInterpolate(a, b, t);
extern internal static CLLocationCoordinate2D _MapPointInterpolate(MapPoint a, MapPoint b, double t);
public static CLLocationCoordinate2D Unproject(MapPoint point) => _Unproject(point);
extern internal static CLLocationCoordinate2D _Unproject(MapPoint point);
public static double MapPointDistance(MapPoint a, MapPoint b) => _MapPointDistance(a, b);
extern internal static double _MapPointDistance(MapPoint a, MapPoint b);