firePropertyChange(WHEEL_SCROLLING_ENABLED_CHANGED_PROPERTY, old, b);
firePropertyChange("wheelScrollingEnabled", old, b);
  public void setWheelScrollingEnabled(boolean b)  {    boolean old = wheelScrollingEnabled;    wheelScrollingEnabled = b;    firePropertyChange(WHEEL_SCROLLING_ENABLED_CHANGED_PROPERTY, old, b);    sync();  }