private Component unwrap(Component c) {
    if (!myUseViewportViewSizes) return c;
    JScrollPane scrollPane = ObjectUtils.tryCast(c, JScrollPane.class);
    JViewport viewport = scrollPane == null ? null : scrollPane.getViewport();
    Component view = viewport == null ? null : viewport.getView();
    return view == null ? c : view;
  }
private Component unwrap(Component c)