public void select(int index) {
        if (!getWidgetConfiguration().getBoolean("unselectable")) {
            if (getSelectedIndex() == index) {
                return;
            }
        }

        WebElement radiobutton = getRadioButton(index);
        WebElement box = radiobutton.findElement(By.className("ui-radiobutton-box"));
        WebElement input = radiobutton.findElement(By.tagName("input"));
        if (isAjaxified(input, "onchange")) {
            PrimeSelenium.guardAjax(box).click();
        }
        else {
            box.click();
        }
    }
Component wrapper for the PrimeFaces {@code p:selectOneRadio}.
primefaces-selenium/primefaces-selenium-components/src/main/java/org/primefaces/selenium/component/SelectOneRadio.java