private void graphServiceRemoved() {
		if (pcodeGraphAction == null) {
			return;
		}
		if (tool.getService(GraphDisplayBroker.class) == null) {
			tool.removeAction(pcodeGraphAction);
			tool.removeAction(astGraphAction);
			astGraphAction.dispose();
			pcodeGraphAction.dispose();
			pcodeGraphAction = null;
			astGraphAction = null;
		}
	}
Sets the group and subgroup information for the given action.
Ghidra/Features/Decompiler/src/main/java/ghidra/app/plugin/core/decompile/DecompilerProvider.java