@Override
	protected Set<AttributedVertex> getVertices(AddressSetView addrSet) {
		if (addrSet.isEmpty()) {
			return Collections.emptySet();
		}

		// Identify all blocks which have an entry point within the selection address set
		Set<AttributedVertex> vertices = new HashSet<>();
		try {
			addVerticesForAddresses(addrSet, vertices);
		}
		catch (CancelledException e) {
			// Will not happen with dummyMonitor
			// Model has already done the work when the graph was created
		}

		return vertices;
	}
{@link GraphDisplayListener} that handles events back and from program graphs.
Ghidra/Features/ProgramGraph/src/main/java/ghidra/graph/program/BlockModelGraphDisplayListener.java