impportMessageUI { error cannot find in scope

      VStack {
                    Text ("FROM")
                        .font(.title)
                        .foregroundColor(.red)

                    impportMessageUI {
            
                    let mailButton = UIButton()
                    func setupButton() {
                        View.addSubview(mailButton)
                        mailButton.backgroundColor = .systemBlue
                        mailButton.addTarget(self,