private void graphServiceAdded() {
		GraphDisplayBroker service = tool.getService(GraphDisplayBroker.class);
		if (service != null && service.getDefaultGraphDisplayProvider() != null) {
			pcodeGraphAction = new PCodeCfgAction();
			addLocalAction(pcodeGraphAction);
			astGraphAction = new PCodeDfgAction();
			addLocalAction(astGraphAction);
		}
	}
Sets the group and subgroup information for the given action.
Ghidra/Features/Decompiler/src/main/java/ghidra/app/plugin/core/decompile/DecompilerProvider.java