What is the role of the `@Body()` decorator in this NestJS code snippet?

Question

Consider the following code snippet:
```ts
@Post()
async create(@Body() createCatDto: CreateCatDto) {
  this.catsService.create(createCatDto);
}
```

What is the role of the `@Body()` decorator in this extract?

Accepted Answer

It extracts the object from the body of the incoming request.

Answer

It is used to validate the body of the incoming request.

Answer

It transforms the request body into a formatted response.

Answer

It returns the body of the answer.

Question from the Nest.js test