@Before
	public void setUp() {
		root = new GTestNode("root");
		node0 = new GTestNode("Node0");
		node1 = new GTestNode("Node1");
		node2 = new GTestNode("Node2");
		node0_0 = new GTestNode("Node0_0");
		node0_1 = new GTestNode("Node0_1");
		node1_0 = new GTestNode("Node1_0");

		AbstractGuiTest.runSwing(() -> {
			root.addNode(node0);
			root.addNode(node1);
			root.addNode(node2);
			node0.addNode(node0_0);
			node0.addNode(node0_1);
			node1.addNode(node1_0);
		});
	}
Class to test the {@link DepthFirstIterator} and {@link BreadthFirstIterator} classes for
iterator through the {@link GTree} nodes.
Ghidra/Framework/Docking/src/test/java/docking/widgets/tree/support/TreeIteratorTest.java