Article_007 https://nalexn.github.io/swiftui-observableobject/

Article_007_ObservableObject_05.swift

struct CustomView: View {
    @EnvironmentObject var appState: Deduplicated<AppState, Snapshot>
    
    var body: some View {
        Text("Value: \(appState.value)")
    }
}

let view = CustomView()
    .environmentObject(appState
        .deduplicated { Snapshot(value: $0.value) })
        
extension CustomView {
    struct Snapshot {
        let value: Int
    }
}