You can have typed indices (https://lib.rs/crates/typed-index-collections https://lib.rs/crates/typed-index-collections), but unless you force the collection to

You can have typed indices (https://lib.rs/crates/typed-index-collections https://lib.rs/crates/typed-index-collections), but unless you force the collection to be a singleton, there's no way to prevent mixing of indices between different instances (clones) of the same collection type.