dispose();
  public void setClosed(boolean b) throws PropertyVetoException  {    if (b && ! isClosed())      {	fireInternalFrameEvent(InternalFrameEvent.INTERNAL_FRAME_CLOSING);	fireVetoableChange(IS_CLOSED_PROPERTY, false, true);	isClosed = b;	firePropertyChange(IS_CLOSED_PROPERTY, false, true);	fireInternalFrameEvent(InternalFrameEvent.INTERNAL_FRAME_CLOSED);      }  }