public boolean isCheckboxSelectionEnabled() {
        // Check the first source item for a checkbox
        final List<WebElement> sourceElements = getSourceListElements();
        if (!sourceElements.isEmpty()) {
            return getCheckbox(sourceElements.get(0)) != null;
        }

        // Check the first target item for a checkbox if the source list is empty
        final List<WebElement> targetElements = getTargetListElements();
        if (!targetElements.isEmpty()) {
            return getCheckbox(targetElements.get(0)) != null;
        }

        return false;
    }
Determines if the pick list has checkbox selection enabled

@return true if checkbox selection is enabled, false otherwise
primefaces-selenium/primefaces-selenium-components/src/main/java/org/primefaces/selenium/component/PickList.java