How to add tooltip for ExactBrowser?

I want to add a different tooltip for the items of ExactBrowser.

I change the demo code (https://openui5.hana.ondemand.com/#test-resources/sap/ui/ux3/demokit/ExactBrowser.html) to this:

var oModel = new sap.ui.model.json.JSONModel();

oModel.setData(oTestData);

var oOutput2 = new sap.ui.commons.TextView();

var oExactBrowser2 = new sap.ui.ux3.ExactBrowser({

attributeSelected: function(oEvent) {

oOutput2.setText(getSelectionMessage(oEvent));

}

});

oExactBrowser2.setModel(oModel);

var oAttrTemplate = new sap.ui.ux3.ExactAttribute();

oAttrTemplate.bindProperty("text", "name");

oAttrTemplate.bindProperty("showSubAttributesIndicator", "subVals");

oAttrTemplate.bindProperty("selected", "selected");

oAttrTemplate.attachSupplyAttributes(function(oEvent){

oEvent.getParameter("attribute").bindAggregation("attributes", "attributes", oAttrTemplate);

});

oAttrTemplate .setTooltip('aabbcc');

oExactBrowser2.bindAggregation("attributes", "/attributes", oAttrTemplate);

But, then I found that it only change the tooltip of the Title, like this:

You know, what I want change is the tooltip of the ITEMs:

(It has a default value, which is same as the item's name.)

How to change the tooltip of this item?

Could you help me?

Thank you!!