# getPersistedReadinessSource

```ts
function getPersistedReadinessSource(config): 
  | PersistedReadinessSource
  | undefined;
```

Defined in: [packages/db/src/persisted-readiness.ts:20](https://github.com/TanStack/db/blob/main/packages/db/src/persisted-readiness.ts#L20)

## Parameters

### config

`object`

## Returns

  \| [`PersistedReadinessSource`](../interfaces/PersistedReadinessSource.md)
  \| `undefined`