alloy, How can I get Menu in controller?

Its my view:

<Alloy>
    <Window class="container" id="container">
 
        <Menu id="menu" platform="android">
                    <MenuItem id="menuItemName" title="a"  showAsAction="Ti.Android.SHOW_AS_ACTION_ALWAYS" />
    </Window>
</Alloy>

var menuItem = $.menuBar.findItem('menuItemName');