@Override
			public void ancestorAdded(AncestorEvent ancestorEvent) {
				vv.getComponent().removeAncestorListener(this);
				Swing.runLater(() -> {
					centerAndScale();
				});
			}
Create and return a {@link VisualizationViewer} to display graphs
@return the new VisualizationViewer
Ghidra/Features/GraphServices/src/main/java/ghidra/graph/visualization/DefaultGraphDisplay.java