items = new ListItem();

        version = version.toLowerCase(Locale.ENGLISH);

        ListItem list = items;

        Deque<Item> stack = new ArrayDeque<>();
        stack.push(list);

        boolean isDigit = false;

        boolean isCombination = false;

        int startIndex = 0;

        for (int i = 0; i < version.length(); i++) {

            return new ActivationFrame(property, parent.map(child));
        }

        @Override
        public Activation transformActivation(Activation target) {
            stk.push(new ActivationFrame("activation", Optional.of(target)));
            try {
                return super.transformActivation(target);
            } finally {
                stk.pop();
            }
        }