@Override
	protected Address getAddress(AttributedVertex vertex) {
		AddressFactory addrFactory = program.getAddressFactory();
		if (vertex.hasAttribute(BSimFeatureGraphType.OP_ADDRESS)) {
			return addrFactory.getAddress(vertex.getAttribute(BSimFeatureGraphType.OP_ADDRESS));
		}
		if (vertex.hasAttribute(BSimFeatureGraphType.BLOCK_START)) {
			return addrFactory.getAddress(vertex.getAttribute(BSimFeatureGraphType.BLOCK_START));
		}
		return null;
	}
Creates a BSimFeatureGraphDisplayListener used to translate between vertices of a BSim 
feature graph and Ghidra addresses
@param tool tool containing the bsim feature visualizer plugin
@param program source of BSim features
@param display graph display for showing the feature graphs
Ghidra/Features/BSimFeatureVisualizer/src/main/java/ghidra/bsfv/BsfvGraphDisplayListener.java