@Override
      public void mousePressed(MouseEvent e) {
        int row = tree.getRowForLocation(e.getX(), e.getY());
        if (row >= 0) {
          TreePath path = tree.getPathForRow(row);
          if (!isCheckboxEnabledFor(path, handler)) return;
          Rectangle checkBounds = checkbox.getBounds();
          checkBounds.setLocation(tree.getRowBounds(row).getLocation());
          if (checkBounds.contains(e.getPoint())) {
            tree.setSelectionRow(row);
            handler.toggle(path, e);
            e.consume();
          }
        }
      }
@Override
      public void mousePressed(MouseEvent e)