LiveData.observe check first parameter by NULL

Question

I use LiveData + MVP architecture.

My View in onCreate say to Presenter:

        presenter = MyApplication.me().getAppComponent().getBasketPresenter();
        presenter.attachView(this);
        presenter.viewIsReady();

And My Presenter get LiveData from Room DB:

LiveData<List<BasketItem>> listLiveData = MyApplication.me().getDatabase().basketDao().getAll();

After that I need observe this LiveData:

    listLiveData.observe(getView(), basketItems -> {
        callView(view -> {
            view.setData(basketItems);
        });
    });

In observe callback I can check view in callView method:

void callView(ViewAction<T> action) {
        if (getView() == null) return;
        action.call(view);
    }

but What about listLiveData.observe(getView()? How can I check it? I need write:

if (getView() == null) return;?

Whether correctly in general I do or make? I get the LiveData in the presenter and I observe on the view?