points: route.polylinePoints
    .where((point) {
      final latValue = point['latitude'];
      final lngValue = point['longitude'];

      if (latValue is! num || lngValue is! num) {
        return false;
      }

      final lat = latValue.toDouble();
      final lng = lngValue.toDouble();

      return lat >= 41.0 &&
          lat <= 41.5 &&
          lng >= 21.2 &&
          lng <= 21.8;
    })
    .map(
      (point) => LatLng(
        (point['latitude'] as num).toDouble(),
        (point['longitude'] as num).toDouble(),
      ),
    )
    .toList(),