swagger with multiple requestBody

How can I implement below using fastify-swagger where we have multiple requestBody contents?

```yaml
openapi: 3.0.1
info:
title: Test API
description: API documentation
version: 1.0.0
paths:
/your-endpoint:
post:
summary: Endpoint to handle multiple content types
tags:
- test
requestBody:
required: true
content:
application/json:
schema:
type: object
properties:
key:
type: string
required:
- key
multipart/form-data:
schema:
type: object
properties:
file:
type: string
format: binary
required:
- file
text/plain:
schema:
type: string
responses:
'200':
description: Successful response
content:
application/hal+json:
schema:
type: object
properties:
message:
type: string
data:
type: object
additionalProperties: true
'400':
description: Bad request
content:
application/json:
schema:
type: object
properties:
message:
type: string
example: Unsupported content type
```