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

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[Home](./index.md) &gt; [@loopback/context](./context.md) &gt; [InvocationContext](./context.invocationcontext.md) &gt; [assertMethodExists](./context.invocationcontext.assertmethodexists.md)

## InvocationContext.assertMethodExists() method

Assert the method exists on the target. An error will be thrown if otherwise.

<b>Signature:</b>

```typescript
assertMethodExists(): Record<string, Function>;
```
<b>Returns:</b>

`Record<string, Function>`


