static AutoCloseable tempAddGlobalMouseEventListener(final F0<AWTEvent> onEvent) {
  final AWTEventListener l = new AWTEventListener {
    public void eventDispatched(AWTEvent evt) {
      pcallF(onEvent, evt);
    }
  };
  Toolkit.getDefaultToolkit().addAWTEventListener(l, AWTEvent.MOUSE_EVENT_MASK);
  ret autoCloseable { Toolkit.getDefaultToolkit().removeAWTEventListener(l); };
}