saas-one/frontend/operation-web/app/view/main/MainModel.js

/**
 * This class is the view model for the Main view of the application.
 */
Ext.define('saas.view.main.MainModel', {
    extend: 'Ext.app.ViewModel',

    alias: 'viewmodel.main',

    data: {
        navWidth: 160,
        smallNavWidth: 64,
    }
});