private ScrollingButton createIncreaseButton()
ScrollingButton createIncreaseButton()
  private ScrollingButton createIncreaseButton()  {    if (incrButton == null)      incrButton = new ScrollingButton(SwingConstants.NORTH);    if (tabPane.getTabPlacement() == SwingConstants.TOP        || tabPane.getTabPlacement() == SwingConstants.BOTTOM)      incrButton.setDirection(SwingConstants.EAST);    else      incrButton.setDirection(SwingConstants.SOUTH);    return incrButton;  }