distance method
Implementation
double distance({required LngLat location}) {
  final radianLocation = LngLatRadians.fromLngLat(location: location);
  final currentRadianLocation = LngLatRadians.fromLngLat(location: this);
  return earthRadius *
      MathUtil.inverseHaversine(
        MathUtil.havDistance(
          currentRadianLocation.latitude,
          radianLocation.latitude,
          (currentRadianLocation - radianLocation).longitude,
        ),
      );
}