Close Menu After Select

Hi

Newbie here :)  I have a settings menu for a data field, and when an item is selected I store the value, however what I cannot work out is how to close the menu after an item is selected?  I have read the docs and there is no method specifically for this.    Any guidance would be appreciated!

class ChowTimeSettingsMenu extends WatchUi.Menu2 {

    public function initialize() {
        Menu2.initialize({:title=>"Settings"});
    }
}

class ChowTimeSettingsMenuDelegate extends WatchUi.Menu2InputDelegate {

    public function initialize() {
        System.println("ChowTimeSettingsMenuDelegate : initialize : called");
        Menu2InputDelegate.initialize();
    }

    public function onSelect(menuItem as WatchUi.MenuItem) as Void {
        System.println("ChowTimeSettingsMenuDelegate : onSelect : called");
        var id = menuItem.getId();
        if (id instanceof Number) {
            Storage.setValue("eatIntervalMinutes", id);
        }

        menuItem.Close ????
    }
}

Regards 

Peter