    /**
     * A non-rendering placeholder item which instructs the Toolbar's Layout to begin using
     * the right-justified button container.
     *
     *     @example
     *     Ext.create('Ext.panel.Panel', {
     *          title: 'Toolbar Fill Example',
     *          width: 300,
     *          height: 200,
     *          tbar : [
     *              'Item 1',
     *              { xtype: 'tbfill' },
     *              'Item 2'
     *          ],
     *          renderTo: Ext.getBody()
     *      });
     */
    Ext.define('Ext.toolbar.Fill', {
        extend: 'Ext.Component',
        alias: 'widget.tbfill',
        alternateClassName: 'Ext.Toolbar.Fill',
        /**
         * @property {Boolean} isFill
         * `true` in this class to identify an object as an instantiated Fill, or subclass thereof.
         */
        isFill : true,
        flex: 1
    });