I am trying to use following code to hide the menu associated to a button. I am not sure how to bind it to the menu component. Will appreciate if anybody can help me out.

Ext.create('Ext.Button', {
text : 'Menu button',
renderTo : Ext.getBody(),
arrowAlign: 'right',
menu : [
{text: 'Item 1'},
{text: 'Item 2'},
{text: 'Item 3'},
{text: 'Item 4'}
listeners: {
mouseout: {
element: 'el',//Which element to use here if i want to bind mouseout to button's menu
fn: function(){ alert('on mouse out'); } // How to hide menu here