Hi everyone! I am having difficulty with an error that I can't seem to solve. I've been trying to make my navigation bars from previous views hide. I finally found the code that I needed, but then I got this error. It is coming from the preview code at the bottom. It says that I need to change happy() to happy(navBarHidden: #BindingBool#) But, when I do this, it gives me another error saying "Editor Placeholder in Source File" I know it wants me to replace this text with something, but I'm not sure what. Any suggestions? Thank you very much! Tyler Nichols import SwiftUI import Swift struct happy: View {   @State private var happy = ["chicken", "burgers", "roast beef"]         @State private var editMode = EditMode.inactive       @Binding var navBarHidden : Bool       var body: some View {     NavigationView {       VStack{         List {           ForEach(happy, id: \.self) { good in             Text(good)           }         }         .navigationBarTitle("My Happy Food", displayMode: .inline)         .onAppear() {           self.navBarHidden = false                       }         .navigationBarItems(leading: EditButton())         .environment(\.editMode, $editMode)         }       }     }   } struct Good_Previews: PreviewProvider {   static var previews: some View {     happy()   } }