File file = new File(path);
        if (!file.exists()) {
            return Collections.emptyList();
        }
        try {
            return new Gson().fromJson(new FileReader(file), new TypeToken<List<UpgradedProperty>>() {}.getType());
        } catch (FileNotFoundException e) {
            throw new UncheckedIOException(e);
        }
    }

    /**