Bug 184755 [DataBinding] internal tree content provider does not work
I broke the tree content providers while trying to update them to use TreePaths. It would be good to have a working implementation again...
examples/org.eclipse.jface.examples.databinding/src/org/eclipse/jface/examples/databinding/contentprovider/test/TreeContentProviderTest.java
private Shell shell;
	private TreeViewer tree;
	
	
	private AsynchronousTestSet set1;
	private AsynchronousTestSet set2;
	private AsynchronousTestSet set3;
	
	
	private UnionSet union;
	private Button randomize;
	public TreeContentProviderTest() {
		
		
		set1 = new AsynchronousTestSet();
		set2 = new AsynchronousTestSet();
		set3 = new AsynchronousTestSet();
		
		
		union = new UnionSet(new IObservableSet[] {set1, set2, set3});
		
		
		shell = new Shell(Display.getCurrent());
		
		createTree();
		
		Composite buttonBar = new Composite(shell, SWT.NONE);
		{
			buttonBar.setLayout(new FillLayout(SWT.HORIZONTAL));