openapi: 3.1.1
info:
  title: OpenAPI 3.1.1 body nested array example
  version: 1
paths:
  /foo:
    post:
      requestBody:
        content:
          'multipart/form-data':
            schema:
              properties:
                foo:
                  items:
                    items:
                      type: integer
                    type: array
                  type: array
              required:
                - foo
              type: object
        required: true
      responses:
        '200':
          description: OK