Misusing openApi spec for generic pagination

[MogensFogh]

Describe the bug
This is the recommendation from the demo project for adding pagination.

                allOf:
                  - $ref: '#/components/schemas/Pagination'
                  - $ref: '#/components/schemas/Orders'

Where Orders is an array with ref to the Order class.
It generates a return value of Pagination and not a combination of Pagination and Orders.

Spec should specify property items:

                allOf:
                  - $ref: '#/components/schemas/Pagination'
                  - type: object
                    required:
                      - items
                    properties:
                      items:
                        type: array
                        items:
                          - $ref: '#/components/schemas/Order'

To Reproduce
Steps to reproduce the behavior:

1. Add Pagination to yaml spec
2. Use other tool to generate client

Expected behavior
Expect that the spec represent the generated api.