@loopback/docs/site/apidocs/testlab.tojson_4.md

Documentation for LoopBack 4

---
lang: en
title: 'API docs: testlab.tojson_4'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/apidocs.testlab.tojson_4.html
---

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[Home](./index.md) &gt; [@loopback/testlab](./testlab.md) &gt; [toJSON](./testlab.tojson_4.md)

## toJSON() function

<b>Signature:</b>

```typescript
export declare function toJSON(value: undefined): undefined;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  value | <code>undefined</code> |  |

<b>Returns:</b>

`undefined`