java rxjava flatmap在改装响应中给出错误

Question

LoginResponse和LoginRequest是我的模型类。我显示错误 响应类来自翻新库，确实无法解决此问题。Rxjava flatmap Func1将进行改装。响应类

public Observable<LoginResponse> performLogin(String emailId, String password) {

    LoginRequest requestBody = new LoginRequest(emailId,password);
    Log.d("LoginRequestBody",requestBody.getLoginId());

    return mSamparkService.performLogin(requestBody)
            .flatMap(new Func1<Response<LoginResponse>, Observable<LoginResponse>>() {
                @Override
                public Observable<LoginResponse> call(Response<LoginResponse> response) {
                    //TODO: remove sensitive debug logs
                    Timber.d("status code: %s", response.code());
                    Timber.d("body: %s", response.body());
                    Timber.d("error body: %s", response.errorBody());
                    Timber.d("message: %s", response.message());

                    try {
                        Log.d(TAG,"in dtl attnd switch case");
                        switch (response.code()) {
                            case 200:


                                return Observable.just(response.body());
                            case 401:
                            case 403:
                                return Observable.error(new UnauthorizedException(response.errorBody().string()));
                            default:
                                return Observable.empty();
                        }
                    } catch (IOException e) {
                        Timber.e(e, "error while signIn");
                        return Observable.error(e);
                    }
                }
            });
}

错误：