How to access a field outside of property from itemTpl's XTemplate in Sencha Touc

Ext.define('IpostApp.view.stock.StockComparePanel', {

extend: 'Ext.Container',

config: {

selectedCode: "ddddd" //想要获取的值

},

items: [

{

xtype: 'list',

itemTpl: [

'<div class ={[this.getDivClassName(values.symbol)]} ></div>',

{

getDivClassName: function(values) {

console.log(this.config.selectedCode); //the seclectedCode iwant to get ，how can i do?????

}

}

]

}]

})

How to access a field outside of property from itemTpl's XTemplate in Sencha Touc