} catch (NoSuchFieldException e) {
                clazz = clazz.getSuperclass();
            }
        }
        throw new NoSuchFieldException(fieldName);
    }

    private static void setPrivateField(Object target, String fieldName, Object value) throws Exception {
        Class<?> clazz = target.getClass();
        while (clazz != null) {
            try {
                Field f = clazz.getDeclaredField(fieldName);