new Interpolation(fa, s -> profileActivationFilePathInterpolator.interpolate(s, context));
                nt.performFor(fa.getExists(), "exists", fa::setExists);
                nt.performFor(fa.getMissing(), "missing", fa::setMissing);
            });
            a.map(Activation::getOs).ifPresent(oa -> {
                Interpolation nt = new Interpolation(oa, interpolator::interpolate);

            stk.push(new ActivationFrame("exists", Optional.empty()));
            validator.accept(fa.getExists());
            stk.peek().location = "missing";
            validator.accept(fa.getMissing());
            stk.pop();
            stk.pop();
        });
        root.map(Activation::getOs).ifPresent(oa -> {
            stk.push(new ActivationFrame("os", Optional.of(oa)));