# RefRecord.keys

Get all keys from the Record.

## Signatures

```ts
export declare const keys: <K extends string, V, E, R>(ref: RefRecord<K, V, E, R>) => RefSubject.Computed<Array<K>, E, R>;
```

## Why

Projects record state with keys for both current reads and future pushes, avoiding a second
mutable cache of the derived value.

## Ownership and lifetime

The keys view retains no independent state. An Effect read samples the source once; Fx
observation follows later pushes and its observing Scope owns subscription cleanup.