ExtJS 5 store in viewmodel

StoreInViewModel.js

In file MyApp/store/Menu.js

Ext.define('MyApp.store.Menu', {
    extend: 'Ext.data.Store',

    requires: [
        'MyApp.model.menu.Root'
    ],

    model: 'MyApp.model.menu.Root',

    proxy: {
        type: 'ajax',
        url: '/rest/menu',
        reader: {
            type: 'json',
            rootProperty: 'items'
        }
    }
});


In file MyApp/view/menu/MenuModel.js

Ext.define('MyApp.view.menu.MenuModel', {
    extend: 'Ext.app.ViewModel',
    alias: 'viewmodel.menu',

    requires: [
        'MyApp.store.Menu',
    ],

    constructor: function() {
        this.callParent(arguments);

        this.setStores({menu:{
                source: Ext.create('MyApp.store.Menu')
            }
        });
    }
});

In my ViewController :

...
    onPanelRender: function() {
        this.getView().getViewModel().getStore('menu').[[[getSource()]]].load(function(records, op, success) {
            ...
        });
....