public NearestAirportService(IGetCurrentLocation locationService)
        {
            _locationService = locationService;

            _airportsService = new AirportNamesService();
            Messenger.Default.Register(this, (FindNearestAirportMessage m) => FindNearestAirport());
        }
        public NearestAirportService(IGetCurrentLocation locationService)
        {
            _locationService = locationService;

            _airportsService = new AirportNamesService();
            Messenger.Default.Register(this, (FindNearestAirportMessage m) => FindNearestAirport());
        }