IdentifiableBinding.swift

extension Binding where Value: MutableCollection, Value.Element: Identifiable {
    subscript(_ id: Value.Element.ID) -> Binding<Value.Element> {
        let index = wrappedValue.firstIndex { $0.id == id }
        guard let index else {
            fatalError("id not found: \(id)")
        }
        return self[index]
    }
}