Use PencilKit PKCanvasView in SwiftUI example

ContentView.swift

import SwiftUI

struct ContentView : View {
    var body: some View {
        PKCanvasRepresentation()
    }
}

#if DEBUG
struct ContentView_Previews : PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}
#endif

PKCanvasRepresentation.swift

import SwiftUI
import PencilKit

struct PKCanvasRepresentation : UIViewRepresentable {
    func makeUIView(context: Context) -> PKCanvasView {
        return PKCanvasView();
    }
    
    func updateUIView(_ uiView: PKCanvasView, context: Context) {
        
    }
}