Hi there, I'm developing an app that uses custom view modifiers using struct View: ViewModifier {} and extension {} but am having issues when it comes to using the below extension: extension View {     func settingsIconViewWithSFSymbols(with icon: <#unknownType#>) -> some View {         self.modifier(settingsIconImageStyleUsingSFSymbols(icon: icons[0]))     } } In that code block just after the with icon text, I'm unsure what type it is. Here's the full block of code, so you can have a look at what I mean. import SwiftUI struct settingsIconImageStyleUsingSFSymbols: ViewModifier {     let icon: rowAndIconView     func body(content: Content) -> some View {         Image(icon.systemImageName)             .resizable()             .aspectRatio(contentMode: .fit)             .frame(width: 35, height: 35)             .padding(7)             .foregroundColor(icon.foregroundColorOfImage)             .background(icon.backgroundColorOfImage)             .cornerRadius(10)             .padding(5)     } } extension View {     func settingsIconViewWithSFSymbols(with icon: <#Unknown Type#>) -> some View { self.modifier(settingsIconImageStyleUsingSFSymbols(icon: icons[0]))     } } struct rowAndIconView: Identifiable {     let id = UUID()     let systemImageName: String     let text: String     let foregroundColorOfImage: Color     let backgroundColorOfImage: Color } I'd really appreciate it if someone could please tell me what type the constant icon is. I just can't seem to figure it out. Thanks! Grey360