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Documentation for LoopBack 4
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Markdown
lang: en
title: 'API docs: rest.restserver._setuprequesthandlerifneeded'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/apidocs.rest.restserver._setuprequesthandlerifneeded.html
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[Home](./index.md) > [@loopback/rest](./rest.md) > [RestServer](./rest.restserver.md) > [\_setupRequestHandlerIfNeeded](./rest.restserver._setuprequesthandlerifneeded.md)
## RestServer.\_setupRequestHandlerIfNeeded() method
<b>Signature:</b>
```typescript
protected _setupRequestHandlerIfNeeded(): void;
```
<b>Returns:</b>
`void`