# RefTrie.compact

Compact Option values.

## Signatures

```ts
export declare const compact: <V, E, R>(ref: RefTrie<Option.Option<V>, E, R>) => RefSubject.Computed<Trie.Trie<V>, E, R>;
```

## Why

Creates a read-only Computed trie by removing None values and unwrapping Some values on each
source version; the result is never absent as a whole.

## Ownership and lifetime

This declaration performs no acquisition and retains no resources. Implementations preserve
source errors, services, and lifetime.