@Override
        public String getToolTipText(MouseEvent event) {
            reloadClassFilters();
            updateClassFilterEditor(false);
            reloadInstanceFilters();
            updateInstanceFilterEditor(false);
            String toolTipText = super.getToolTipText(event);
            return getToolTipText().length() == 0 ? null : toolTipText;
        }
@Override
        public String getToolTipText(MouseEvent event)