Use of unresolved identifier 'self

This is my code:

i

import SwiftUI

 struct RestaurantView: View {
    
    @State private var isSshowingMapActionSheet = false
    @State private var isShowingSafariView = false
    let restaurant: Restaurant!
    var currenstatus: String  {
        return restaurant.isOpen ? "Open" :  "Closed"
    }
    let mapActionSheetButtons: [ActionSheet.Button] = [
        .default(Text("Öppna i Kartor"), action: {
            self.restaurant.openInMaps()  <-- ERROR OCCURS HERE
        }),
        .default(Text("Öppna i Google Maps"), action: {
            self.restaurant.openInGoogleMaps()  <-- AND HERE
        }),
        .cancel(Text("Avbryt"))
    ]
    lazy var mapActionSheet = ActionSheet(title: Text(""), buttons: mapActionSheetButtons)
    
    init(_ restaurant: Restaurant) {
        self.restaurant = restaurant
    }
    
    
    
    var body: some View {
        List {
            ListRow(Image("ClockGlyph"), action: {
                
            }, label: {
                OpenHoursView(restaurant)
            })
            
            ListRow(Image("PhoneGlyph"), action: {
                UIApplication.shared.op
            }, label: {
                Text(self.restaurant!.phone)
            })
            
            if (restaurant.homepage != nil) {
                ListRow(Image("SafariGlyph"), action: {
                    self.isShowingSafariView.toggle()
                }, label:  {
                    Text(restaurant.homepage)
                })
            } // End of if
            
            ListRow(Image("PhoneGlyph"), action: {
                UIApplication.shared.canOpenURL(self.restaurant.phoneURL)
            }, label: {
                Text(self.restaurant.phone)
            })
            
            if restaurant!.facebookURL != nil {
                ListRow(Image("FacebookGlyph"), action: {
                }, label: {
                    Text(self.restaurant.facebookURL!)
                })
            }
            
            ListRow(Image("PinGlyph"), action: {
                self.isSshowingMapActionSheet.toggle()
            }, label: {
                VStack {
                    Text(restaurant!.address!.replacingOccurrences(of: "\n", with: ", "))
                    Text("Visa vägbeskrivning")
                        .font(.subheadline)
                        .foregroundColor(.gray)
                }
                
            })
                
                .actionSheet(isPresented: $isSshowingMapActionSheet, content: mapActionSheet)
                .sheet(item: $isShowingSafariView, content: {
                    SafariView(url: restaurant.homepageURL)
                    
                })
        } // End of List
    } // End of body
 } // End of RestaurantView

 struct RestaurantView_Previews: PreviewProvider {
    static var previews: some View {
        RestaurantView(Restaurant.allRestaurants.first!)
    }
 }

}