[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Lookup](https://evolu.dev/docs/api-reference/common/Lookup) › createLookupMap

```ts
function createLookupMap<K, V, L>(
  __namedParameters: CreateLookupMapOptions<K, V, L>,
): LookupMap<K, V>;
```

Defined in: [packages/common/src/Lookup.ts:83](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Lookup.ts#L83)

Creates [LookupMap](https://evolu.dev/docs/api-reference/common/Lookup/interfaces/LookupMap).