OpenAPI 3.0: references defined in examples should not be dereferenced

[char0n]

When defining a reference inside of examples fields on various spec objects, instead of the Example Object, the reference should not be dereferenced.

For this specification:

  responses:
    ExampleResponse:
      description: An error occurred
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ExampleModel'
          examples:
            $ref: '#/components/examples/tshirt'
  examples:
    tshirt:
      summary: Sample T-shirt data
      value:
        # Example value starts here
        id: 17
        name: T-shirt
        description: 100% cotton shirt
        categories: [clothes]

when the example gets dereferenced, each field of tshirt will be seen as a separate example. Each of them will be rendered as an option for examples select:

This does not happen for OpenAPI 3.1:

Additional context or thoughts

To fix this, we need to utilise ApiDOM for OpenAPI 3.0.

---

Originally reported by @glowcloud