# neighbors

Get neighbors of a node.

## Signatures

```ts
export declare const neighbors: {
    (nodeIndex: Graph.NodeIndex): <N, E, T extends Graph.Kind, Err, R>(ref: RefGraph<N, E, T, Err, R>) => RefSubject.Computed<Array<Graph.NodeIndex>, Err, R>;
    <N, E, T extends Graph.Kind, Err, R>(ref: RefGraph<N, E, T, Err, R>, nodeIndex: Graph.NodeIndex): RefSubject.Computed<Array<Graph.NodeIndex>, Err, R>;
};
```

## Why

Get neighbors of a node. The operation remains attached to the RefSubject's versioned state
boundary.

## Ownership and lifetime

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