# setMany

Set multiple key-value pairs in the RefHashMap.

## Signatures

```ts
export declare const setMany: {
    <K, V>(entries: Iterable<readonly [
        K,
        V
    ]>): <E, R>(ref: RefHashMap<K, V, E, R>) => Effect.Effect<HashMap.HashMap<K, V>, E, R>;
    <K, V, E, R>(ref: RefHashMap<K, V, E, R>, entries: Iterable<readonly [
        K,
        V
    ]>): Effect.Effect<HashMap.HashMap<K, V>, E, R>;
};
```

## Why

Keeps set many atomic with respect to competing RefSubject writes instead of splitting the read
and replacement into separate effects.

## Ownership and lifetime

Running set many performs one serialized hash map transition and resolves with its committed
value. It acquires no resource; failures and services remain those of the source ref.