firePropertyChange(LAYOUT_CHANGED_PROPERTY, old, l);
firePropertyChange("layout", old, l);
  public void setLayout(LayoutManager l)  {    LayoutManager old = super.getLayout();    ScrollPaneLayout tmp = (ScrollPaneLayout) l;    super.setLayout(l);    tmp.syncWithScrollPane(this);    firePropertyChange(LAYOUT_CHANGED_PROPERTY, old, l);    sync();  }