static TrayIcon installTrayIcon(S imageID, S tooltip) {
  ret installTrayIcon(imageID, tooltip, null);
}

// menuItems can also just be a PopupMenu
// also, first of menuItems can be a Runnable for left-click on icon
static TrayIcon installTrayIcon(fS _imageID, fS _tooltip, fO... _menuItems) ctex {
  ret swing(func -> TrayIcon {
  
    // convenience parameter swap :-)
 
    S imageID = _imageID, tooltip = _tooltip;
    if (!isSnippetID(imageID) && isSnippetID(tooltip)) {
      S s = tooltip;
      tooltip = imageID;
      imageID = s;
    }
    
    Runnable leftClick = null;
    O[] menuItems = _menuItems;   
    if (l(menuItems) > 0 && menuItems[0] instanceof Runnable) {
      leftClick = (Runnable) menuItems[0];
      menuItems = dropFirst(menuItems);
    }
  
    PopupMenu menu = makePopupMenu(menuItems);
    TrayIcon trayIcon = new TrayIcon(imageIcon(imageID).getImage(), tooltip, menu);
    trayIcon.setImageAutoSize(true);
    
    if (leftClick != null) {
      final Runnable _leftClick = leftClick;
      onLeftClick(trayIcon, _leftClick);
    }
    
    SystemTray.getSystemTray().add(trayIcon);
    ret trayIcon;
  });
}