protected @Nullable Point findPointRelativeToCheckBox(int x, int y, @NotNull JCheckBox checkBox, int index) {
    int cx = x - myCellRenderer.getBorderInsets().left;
    int cy = y - myCellRenderer.getBorderInsets().top;
    return  cx >= 0 && cy >= 0 ? new Point(cx, cy) : null;
  }
protected @Nullable Point findPointRelativeToCheckBox(int x, int y, @NotNull JCheckBox checkBox, int index)