import mx.collections.ArrayCollection;
private var myHierarchicalData:ArrayCollection = new ArrayCollection([
{Column1:"A", children: [
{Column1:"B", children: [
{Column2:"C", Value1:3, Value2:4},
{Column2:"D", Value1:2, Value2:3}]},
{Column1:"E", children: [
{Column2:"F", Value1:2, Value2:3}]},
{Column1:"G", children: [{Column2:"H", Value1:5, Value2:4}]},
{Column1:"I", children: [
{Column2:"J", Value1:3, Value2:4},
{Column2:"K", Value1:5, Value2:4}]},
{Column1:"L", children: [
{Column2:"M", Value1:4, Value2:4},
{Column2:"N", Value1:4, Value2:4}]}
]}
]);