private void OnLocation(MvxGeoLocation location)
        {
            var message = new LocationMessage(this,
                                              location.Coordinates.Latitude,
                                              location.Coordinates.Longitude
                );

            _messenger.Publish(message);
        }
 private void OnLocationMessage(LocationMessage locationMessage)
 {
     Lat = locationMessage.Lat;
     Lng = locationMessage.Lng;
 }