* @param slot The slot to emigrate from.
     */
    private void emigrate(Player player, int slot) {
        Europe europe = player.getEurope();
        EuropeWas europeWas = new EuropeWas(europe);
        if (askServer().emigrate(slot)) {
            europeWas.fireChanges();
            gui.updateMenuBar();
        }
    }