How to Map response error model in swagger 3.0.0?

Question

I am upgrading my swagger config from 2.9 to 3.0.0 via springfox-boot-starter and I am following https://springfox.github.io/springfox/docs/snapshot/ - very useful.

I am stuck at upgrading below method:

Current implementation:

private ResponseMessage badRequestErrorResponse() {

        return new ResponseMessageBuilder().code(HttpServletResponse.SC_BAD_REQUEST)
                                           .message(HttpStatus.BAD_REQUEST.getReasonPhrase())
                                           .responseModel(
                                                   new ModelRef(ErrorResponse.class.getSimpleName()))
                                           .build();
    }

Upgraded code

private Response badRequestErrorResponse() {

        return new ResponseBuilder().code(String.valueOf(HttpServletResponse.SC_BAD_REQUEST))
                .description(HttpStatus.BAD_REQUEST.getReasonPhrase())
                . /* How to assign error Model here*/
                .build();
    }

Please help to map responseModel(marked in code above).

My ErrorResponse class is:

@Getter
public class ErrorResponse {

    @JsonProperty("error-code")
    private final int errorCode;

    @JsonIgnore
    private final HttpStatus status;

    @JsonProperty("error-message")
    private final String errorMessage;

    @JsonProperty("timestamp")
    private final Instant timestamp = Instant.now();

    @JsonInclude(JsonInclude.Include.NON_NULL)
    private Map<String, Map<String, List<String>>> requestParameterErrors;

    public ErrorResponse(final ErrorCode errorCodes,
                         final HttpStatus status,
                         final Map<String, Map<String, List<String>>> errors) {

        this.errorCode = errorCodes.getCode();
        this.status = status;
        this.errorMessage = errorCodes.getDefaultErrorMessage();
        if (MapUtils.isNotEmpty(errors)) {
            this.requestParameterErrors = errors;
        }
    }

    public ErrorResponse(final ErrorCode errorCode,
                         final HttpStatus status) {

        this.errorCode = errorCode.getCode();
        this.status = status;
        this.errorMessage = errorCode.getDefaultErrorMessage();
    }

    public ErrorResponse(final int errorCode,
                         final HttpStatus status,
                         final String errorMessage) {

        this.errorCode = errorCode;
        this.status = status;
        this.errorMessage = errorMessage;
    }

    public ErrorResponse(final HttpStatus status,
                         final AbstractRPRuntimeException exception) {

        this(exception.getErrorCode().getCode(), status, exception.getMessage());
    }
}