firePropertyChange(TAB_PLACEMENT_CHANGED_PROPERTY, oldPlacement, this.tabPlacement);
firePropertyChange("tabPlacement", oldPlacement, this.tabPlacement);
  public void setTabPlacement(int tabPlacement)  {    if (tabPlacement != TOP && tabPlacement != BOTTOM && tabPlacement != RIGHT        && tabPlacement != LEFT)      throw new IllegalArgumentException("tabPlacement is not valid.");    if (tabPlacement != this.tabPlacement)      {	int oldPlacement = this.tabPlacement;	this.tabPlacement = tabPlacement;	firePropertyChange(TAB_PLACEMENT_CHANGED_PROPERTY, oldPlacement,	                   this.tabPlacement);      }  }