@Override
                    public void onClick(View widget) {
                        if (onClickATagListener != null) {
                            onClickATagListener.onClick(widget, getURL());
                        } else {
                            super.onClick(widget);
                        }
                    }
Tells us which level of table tag we're on; ultimately used to find the root table tag.
android/modules/module_common/src/main/java/github/tornaco/android/thanos/widget/html/HtmlTagHandler.java