@Override
	protected AddressSet getAddresses(Set<AttributedVertex> vertices) {
		AddressSet set = new AddressSet();
		for (AttributedVertex vertex : vertices) {
			Address address = getAddress(vertex);
			if (address != null) {
				set.add(address);
			}
		}
		return set;
	}
GraphDisplayListener for a PCode data flow graph
Ghidra/Features/Decompiler/src/main/java/ghidra/app/plugin/core/decompile/actions/PCodeDfgDisplayListener.java