public void putRegroupSettings(FunctionGraph functionGraph, SaveableXML saveableXML) {
		FGVertex rootVertex = functionGraph.getRootVertex();
		Address entryPoint = rootVertex.getVertexAddress();
		regroupSettingsUpdateMap.put(entryPoint, saveableXML);
	}
Note: this method does not clear group vertex locations.
@param functionGraph function graph
Ghidra/Features/FunctionGraph/src/main/java/ghidra/app/plugin/core/functiongraph/mvc/FunctionGraphVertexAttributes.java