# Many

A collection source, stable key function, and per-item view supplied to a
renderer. Describing the collection acquires nothing; the active target owns
subscription and child lifetimes.

The DOM target retains each key's subject and scope across moves. The HTML
target consumes an initial collection for finite response output. Construct
descriptors with `many` rather than assembling this protocol by hand.

## Signatures

```ts
export interface Many<A, E, R> {
    readonly [ManyTypeId]: ManyTypeId;
    readonly values: Fx.Fx<ReadonlyArray<A>, E, R>;
    readonly getKey: (value: A) => PropertyKey;
    readonly render: (value: RefSubject.RefSubject<A>, key: PropertyKey) => Fx.Fx<RenderEvent, E, R>;
}
```

## Property: [[computed:[ManyTypeId]]]

Descriptor recognition.

## Property: getKey

Identity independent of array position.

## Property: render

Renders a retained item through its live subject.

## Property: values

Current ordered records and later collection changes.