swagger-core

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I have the following class that returns an array of abstract classes that looks like this:

@JsonPropertyOrder({"answers"})
@Schema(name = QuestionAnswers, description = "")
public final class QuestionAnswersJson extends AbstractJson {
  @ArraySchema(schema = @Schema(oneOf = {XAnswerJson.class, YAnswerJson.class, //
      ZAnswerJson.class, BAnswerJson.class}))
  private List<AbstractAnswerJson> answers = new ArrayList<>();
  
  public QuestionAnswersJson(@Nonnull List<AbstractAnswerJson> answers) {
    answers = Preconditions.checkNotNull(answers);
  }
  
  public QuestionAnswersJson() {
    // for JSON-to-Java conversion
  }
  
  public List<AbstractAnswerJson> getAnswers() {
    return answers;
  }
  
  public void setAnswers(List<AbstractAnswerJson> answers) {
    answers = answers;
  }  
}

The @ArraySchema annotation is completely ignored and the resulting class in the YAML file is an array of AbstractAnswers:

"QuestionAnswers" : {
        "type" : "object",
        "properties" : {
          "answers" : {
            "type" : "array",
            "items" : {
              "$ref" : "#/components/schemas/AbstractAnswer"
            }
          }
        }

But I would like to have something similar to this:

"QuestionAnswers" : {
        "type" : "object",
        "properties" : {
          "answers" : {
            "type" : "array",
            "items" : {
              oneOf:
                "$ref" : "#/components/schemas/XAnswer"
                "$ref" : "#/components/schemas/YAnswer"
                "$ref" : "#/components/schemas/ZAnswer"
                "$ref" : "#/components/schemas/BAnswer"
            }
          }
        }

Is that something incorrectly done on my side or is there a bug regarding @ArraySchema?