@Override
    public WebElement getAssignedLabel() {
        return getWebDriver().findElement(By.cssSelector("label[for='" + getId() + (isEditable() ? "_focus" : "_label") + "']"));
    }
All labels independent of filter.
@return
primefaces-selenium/primefaces-selenium-components/src/main/java/org/primefaces/selenium/component/SelectOneMenu.java