The Flex Tree control is amazingly useful when building applications, especially if you're dealing with hierarchical data. To learn how to add the power of this intuitive organizational component to your developer's toolbox, keep reading.
Now we're making progress. We have effectively populated our Tree with leaf nodes. It is good, but not complete. Next, we will need to turn our leaf nodes into branches and give our new branches additional leaf nodes. We do this by adding child nodes to our XML groups. The Tree will automatically recognize that the top level nodes have children and change their icons to folders. Here is the updated XMLList: