[BUG] Resolve Fully does not work?

Hi folks,

I am new in OpenAPI,

I have the following yaml file:

openapi: 3.0.1
info:
  title: ping test
  version: '1.0'
servers:
  - url: 'http://localhost:888888/'
paths:
  /some/ping:
    get:
      operationId: AAAAA
      responses:
        '201':
          description: OK
          content:
            application/json:
              schema:
                $ref: 'some-swagger-response.yaml'
components:
  schemas: {}

What I want is to get an String output, containing all the output above and resolving the "$ref".

This is my code snippet:

String inputSpec = "./src/main/java/swagger-reference-response.yaml";
        OpenAPIParser openApiParser = new OpenAPIParser();
        ParseOptions options = new ParseOptions();
        options.setResolveFully(true);
        options.setFlatten(false);

        OpenAPI openAPI = openApiParser.readLocation(inputSpec, null, options).getOpenAPI();
        String string = Yaml.mapper().writerWithDefaultPrettyPrinter().writeValueAsString(openAPI);

        System.out.println(string);

The output of the String is:

`openapi: 3.0.1
info:
  title: ping test
  version: "1.0"
servers:
- url: http://localhost:888888/
paths:
  /some/ping:
    get:
      operationId: AAAAA
      responses:
        "201":
          description: OK
          content:
            application/json:
              schema:
                type: object
components:
  schemas:
    some-swagger-response:
      type: object`

How can I get the full content of this file inside the String? $ref: 'some-swagger-response.yaml'

Thank you very much

Start by reproducing the example with OpenAPIParser, ParseOptions.setResolveFully(true), and Yaml.mapper(), using swagger-reference-response.yaml and the external some-swagger-response.yaml reference. Compare the parsed model with the serialized YAML and inspect parser tests or entry points for external-reference resolution; done means the expected referenced content is either emitted or the behavior is clearly documented.