private static Map<AddressHasher, FGVertex> hashVerticesByStartAndEndAddress(
			FunctionGraph functionGraph) {
		Map<AddressHasher, FGVertex> map = new HashMap<>();
		Graph<FGVertex, FGEdge> graph = functionGraph;
		Collection<FGVertex> vertices = graph.getVertices();

		for (FGVertex vertex : vertices) {
			AddressSetView addresses = vertex.getAddresses();
			Address minAddress = addresses.getMinAddress();
			Address maxAddress = addresses.getMaxAddress();
			map.put(new AddressHasher(minAddress, maxAddress), vertex);
		}
		return map;
	}
Signals that the user has changed the text of a group node and that and this pre-existing
info needs to update.

@param text The new text
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/graph/vertex/GroupHistoryInfo.java