How to use the @ember-data/adapter/error.ConflictError function in @ember-data/adapter

} else if (this.isInvalid(status, headers, payload)) {
      return new InvalidError(payload.errors);
    }

    let errors = this.normalizeErrorResponse(status, headers, payload);
    let detailedMessage = this.generatedDetailedMessage(status, headers, payload, requestData);

    switch (status) {
      case 401:
        return new UnauthorizedError(errors, detailedMessage);
      case 403:
        return new ForbiddenError(errors, detailedMessage);
      case 404:
        return new NotFoundError(errors, detailedMessage);
      case 409:
        return new ConflictError(errors, detailedMessage);
      default:
        if (status >= 500) {
          return new ServerError(errors, detailedMessage);
        }
    }

    return new AdapterError(errors, detailedMessage);
  },