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var dataSource:HierarchicalCollectionView=this.dataProvider as HierarchicalCollectionView;
if(dataSource!=null && dataIndex < dataSource.length-1 ){
var item:Object = dataSource.mx_internal::treeData.getItemAt(dataIndex);
color = this.rowColorFunction.call(this, item,color);
}
super.drawRowBackground(s,rowIndex,y,height,color,dataIndex);
}