try {
            Model model = readFileModel(request, problems);

            try {
                if (transformer != null && context != null) {
                    transformer.transform(context, model, pomFile);
                }
            } catch (ModelBuilderException e) {
                problems.add(Severity.FATAL, ModelProblem.Version.V40, null, e);

    private static class ActivationWalker extends MavenTransformer {

        private final Deque<ActivationFrame> stk;

        ActivationWalker(Deque<ActivationFrame> stk, UnaryOperator<String> transformer) {
            super(transformer);
            this.stk = stk;
        }

        private ActivationFrame nextFrame(String property) {
            return new ActivationFrame(property, Optional.empty());
        }