@Override
		public void itemStateChanged(ItemEvent e) {

			@SuppressWarnings("unchecked")
			E edge = (E) e.getItem();
			edge.setSelected(e.getStateChange() == ItemEvent.SELECTED);
		}
Sets the given vertex to be the focused vertex.  This will be the only focused vertex.

@param vertex the vertex
Ghidra/Framework/Graph/src/main/java/ghidra/graph/viewer/GraphComponent.java