Define OpenAPI 3.x `links` [{Link Object}](https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.0.md#link-object) map an OpenAPI 2.0 API [Response Object](https://github.com/OAI/OpenAPI-Specification/blob/master/versions/2.0.md#response-object). This allows converting OpenAPI 2.0 to OpenAPI 3.0 for tools which work with OpenAPI 3.0.

                        {"responses":{"200":{"description":"A book resource","content-type":"application/json","x-links":[{"operationId":"getAuthor"},{"operationId":"getPublisher"}]}}}