# Function: checkComputed()

```ts
function checkComputed(computed, at?): string | null;
```

Defined in: [packages/core/src/query/computed.ts:83](https://github.com/leifriksheim/minca/blob/main/core/src/query/computed.ts#L83)

Why a definition's `computed` member can't be used, or null

## Parameters

| Parameter | Type | Default value |
| ------ | ------ | ------ |
| `computed` | `unknown` | `undefined` |
| `at?` | `string` | `'computed'` |

## Returns

`string` \| `null`