Convenient wrapper to make existing types conform to identifiable without changing their definition

IdentifiableItem.swift

let a = IdentifiableItem(User(id: 1))
let b = IdentifiableItem(User(id: 1), id: \.id)

@dynamicMemberLookup
struct IdentifiableItem<Item, ID: Hashable>: Identifiable {
    var item: Item
    let id: ID

    init(_ item: Item) where ID == UUID {
        self.item = item
        self.id = UUID()
    }

    init(_ item: Item, id: KeyPath<Item, ID>) {
        self.item = item
        self.id = item[keyPath: id]
    }

    public subscript<Property>(dynamicMember keyPath: WritableKeyPath<Item, Property>) -> Property {
        get { item[keyPath: keyPath] }
        set { item[keyPath: keyPath] = newValue }
    }
}