# mergeMetadata

# Function: mergeMetadata()

```ts
function mergeMetadata(current, incoming): MetadataRecord | undefined;
```

Defined in: [packages/ai/src/utilities/merge-metadata.ts:12](https://github.com/TanStack/ai/blob/main/packages/ai/src/utilities/merge-metadata.ts#L12)

## Parameters

### current

`MetadataRecord` \| `undefined`

### incoming

`MetadataRecord` \| `null` \| `undefined`

## Returns

`MetadataRecord` \| `undefined`