How to make ElementsContainer works?

My selenide version is the latest, and I need to introduce ElementsContainer for my testing, from my study of ElementsContainer in simple, but it fail, looks like ElementsContainer is not straightforward to use, my codes as below:

public class SearchPage {

    @FindBy(css = "div[class='RNNXgb']")
    public SearchBlock searchBlock;

    public void open() {
        Selenide.open("https://www.google.com");
    }

    public void search(String text) {
        searchBlock.searchInput.val(text).pressEnter();
    }

    static class SearchBlock extends ElementsContainer {
        SelenideElement searchIcon
                = $("div[class='hsuHs']");
        SelenideElement searchInput
                = $(By.name("q"));
        SelenideElement voiceIconBtn
                = $("div[class='hpuQDe']");
    }

}

My testing code:

public void f2() {
        SearchPage page = new SearchPage();
        page.open();
        page.search("selenide");
}

finally, I got the error as below.

As less error message from the exception, so I don’t know how to fix, could someone advise how to fix it?

Thanks

[ansonliao]

Hi @asolntsev , we have already migrated the existed Selenium to the Selenide framework, and integrated it with the Allure report, (but finally, we will drop allure and migrate to reportoral). Thanks for your great work to answer my question.

[ansonliao]

I think we can close this issue.