# RefHashSet

A RefHashSet is a RefSubject specialized over a HashSet.

## Signatures

```ts
export interface RefHashSet<in out V, in out E = never, out R = never> extends RefSubject.RefSubject<HashSet.HashSet<V>, E, R> {
}
```

## Why

Defines hash set state with the same current-read, pushed-update, and synchronized-write
contract as RefSubject.

## Ownership and lifetime

RefHashSet is a contract and performs no acquisition. Implementations retain the errors,
services, interruption, and Scope requirements expressed by its members.