public void hideViewerBorder() {
    int borders = switch (myToolbarAnchor) {
      case SwingConstants.TOP -> SideBorder.TOP;
      case SwingConstants.BOTTOM -> SideBorder.BOTTOM;
      case SwingConstants.LEFT -> SideBorder.LEFT;
      case SwingConstants.RIGHT -> SideBorder.RIGHT;
      default -> SideBorder.NONE;
    };

    setViewerBorder(IdeBorderFactory.createBorder(borders));
  }
public void hideViewerBorder()