I am trying to store a user selected location in Firestore but not sure what the best approach to use as MKPlacement is not decodable.

When I perform the search for the location searched for by the user I am using the following model:

struct MapLandmark {

    let placemark: MKPlacemark

    var id: UUID {
        return UUID()
    }

    var name: String {
        self.placemark.name ?? ""
    }

    var title: String {
        self.placemark.title ?? ""
    }

    var coordinate: CLLocationCoordinate2D {
        self.placemark.coordinate
    }
}

And the function:

private func nearByLandmarks(location : String) {

        let request = MKLocalSearch.Request()
        request.naturalLanguageQuery = location

        let search = MKLocalSearch(request: request)
        search.start { (response, error) in
            if let response = response {

                let mapItems = response.mapItems
                self.landmarks = mapItems.map {
                    MapLandmark(placemark: $0.placemark)
                }

            }

        }

    }

What would be the reccomended approach moving forward so I am able to store a copy of this information in Firestore?

Thanks in advance.