openApi_generator_issue_11220.yaml

openapi: 3.0.1
info:
  title: Test additional properties with ref
  version: '1.0'
servers:
  - url: 'http://localhost:8000/'
paths:
  /ping:
    post:
      operationId: ping
      responses:
        default:
          description: default response
          content:
            application/json:
              schema:
                type: object
                additionalProperties:
                  type: object
                  additionalProperties:
                    type: object
                    additionalProperties:
                      "$ref": "#/components/schemas/Person"
components:
  schemas:
    Person:
      type: object
      properties:
        lastName:
          type: string
        firstName:
          type: string