    /**
     * @class Ext.toolbar.Item
     * @extends Ext.Component
     * The base class that other non-interacting Toolbar Item classes should extend in order to
     * get some basic common toolbar item functionality.
     */
    Ext.define('Ext.toolbar.Item', {
        extend: 'Ext.Component',
        alias: 'widget.tbitem',
        alternateClassName: 'Ext.Toolbar.Item',
        enable:Ext.emptyFn,
        disable:Ext.emptyFn,
        focus:Ext.emptyFn
        /**
         * @cfg {String} overflowText Text to be used for the menu if the item is overflowed.
         */
    });