modifiers = EventModifier.extend(modifiers);
modifiersEx = EventModifier.extend(modifiers) & EventModifier.NEW_MASK;
  private void readObject(ObjectInputStream s)    throws IOException, ClassNotFoundException  {    s.defaultReadObject();    if ((modifiers & EventModifier.OLD_MASK) != 0)      {        if ((modifiers & BUTTON1_MASK) != 0)          button = BUTTON1;        else if ((modifiers & BUTTON2_MASK) != 0)          button = BUTTON2;        else if ((modifiers & BUTTON3_MASK) != 0)          button = BUTTON3;        modifiers = EventModifier.extend(modifiers);      }  }