OptionalView(property.coordinates) { coordinates in
    MapView(title: self.property.name, coordinate: coordinates)
    .frame(height: 300)
}
.fallbackView {
    HStack {
        Spacer()
        Image(systemName: "mappin.circle")
            .imageScale(.large)
            .frame(height: 300)
        Spacer()
    }
}

struct MapView_Previews: PreviewProvider {
    static var previews: some View {
        MapView(title: "Test", coordinate: CLLocationCoordinate2D(latitude: 50.6047859, longitude: -2.4686725))
    }
}

struct ImagePicker_Previews: PreviewProvider {
    static var previews: some View {
        ImagePicker(image: .mock(nil))
    }
}

PickerView(url: self.$uploadFile)

PDFKitView(url: URL(string: "File.pdf")

ProgressBar(value: $file.progress)
.frame(height: 20)

struct WebView4_Previews: PreviewProvider {
    static var previews: some View {
        NavigationView {
            Display(site: "https://www.apple.com/")
        }
    }
}

var body: some View {
AdaptiveStack {
Form {

struct PickerView_Preview: PreviewProvider {
    static var previews: some View {
        return PickerView(url: .constant(URL(string: "www.apple.com")))
            .aspectRatio(3/2, contentMode: .fit)
        .previewAsComponent()
    }
}

struct PickerView_Preview: PreviewProvider {
    static var previews: some View {
        return PickerView(url: .constant(URL(string: "www.apple.com")))
            .aspectRatio(3/2, contentMode: .fit)
        .previewAsScreen()
    }
}