using var to retrieve chartItem data

[tsj4]

I have a variable which hold the name of the object I am trying to target in my array collection.

example

var ac:ArrayCollection = new ArrayCollection([{country:"USA", amount:19000}, {country:"JPN", amount:7800  }])
var label:String  = "country";

I need to access this value for my custom dataTipFunction. I have tried this with no success

private function pieDataTipFunc(h:HitData) :String
        {
           var psi:PieSeriesItem = h.chartItem as PieSeriesItem;
           var s:String;
           
            s = psi.item(label)+"\nTotal Offload : "+decimalToPercentage(Number(psi.value));

            return s;
        }

Also when I try this it fails

private function pieDataTipFunc(h:HitData) :String
        {
           var psi:PieSeriesItem = h.chartItem as PieSeriesItem;
           var s:String;
           
            s = psi.item.label+"\nTotal Offload : "+decimalToPercentage(Number(psi.value));

            return s;
        }

[tsj4]

if this is not possible what would the equiv to xFeild and yFeild of xValue or yValue be since a pie chart does not use these properties?

such as

PieChartItem(hitData.element).field
PieChartItem(hitData.element).nameField

[tsj4]

Ok, both example of what I was trying are clearly wrong since I should be using the hitData info.

I have modified the attempts to reflect a more accurate approach but still with no success.

var ac:ArrayCollection = new ArrayCollection([{country:"USA", amount:19000}, {country:"JPN", amount:7800  }])
var label:String  = "country";


private function pieDataTipFunc(h:HitData) :String
{
   var psi:PieSeriesItem = h.chartItem as PieSeriesItem;
   var s:String;

   s = h.item.label+"\n"+"Total Offload : "+decimalToPercentage(Number(psi.value));
                 
   return s;
}

The part in question is

h.item.label