public AttributedVertex getVertex(Address address) {
		if (address == null) {
			return null;
		}
		String id = getVertexId(address);
		if (id == null) {
			return null;
		}

		return graphDisplay.getGraph().getVertex(id);
	}
Base class for GraphDisplay listeners whose nodes represent addresses.
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/graph/AddressBasedGraphDisplayListener.java