private InlineSvgButton createNavigationButton(
            final SvgImage svgImage, final int noOfMonths, String styleName) {
        InlineSvgButton button = new InlineSvgButton();
        button.setSvg(svgImage);
        button.addClickHandler(event -> addMonths(noOfMonths));
        button.addStyleName(styleName);
        button.setTabIndex(-2);

        return button;
    }
Returns the ListBox for selecting the year
stroom-core-client-widget/src/main/java/stroom/widget/datepicker/client/DefaultMonthSelector.java