# Function: checkBlueprint()

```ts
function checkBlueprint(value): string | null;
```

Defined in: [packages/core/src/schemas/blueprints.ts:39](https://github.com/leifriksheim/minca/blob/main/core/src/schemas/blueprints.ts#L39)

Why this can't be a blueprint, or null when it can

## Parameters

| Parameter | Type |
| ------ | ------ |
| `value` | `unknown` |

## Returns

`string` \| `null`