class PolicyClientImpl implements PolicyClient {

    protected Config getConfigFromStringJson(String configJson)
            throws JsonParseException, JsonMappingException, IOException {
        String unescapedJson = configJson.replaceAll("\\\\", "");
        mapper.configure(SerializationFeature.WRAP_ROOT_VALUE, false);
        mapper.configure(DeserializationFeature.UNWRAP_ROOT_VALUE, false);
        return mapper.readValue(unescapedJson, Config.class);
    }

    public  PolicyClientImpl();

}