@Override
	public AttributedGraph getGraph() {
		return graph;
	}
Use the hide selected action states to determine what vertices are shown:
<ul>
    <li>unselected vertices only</li>
    <li>selected vertices only</li>
    <li>both selected and unselected vertices are shown</li>
    <li>neither selected nor unselected vertices are shown</li>
</ul>
Ghidra/Features/GraphServices/src/main/java/ghidra/graph/visualization/DefaultGraphDisplay.java