"Class parameter for loadCGCIHierarchy() must be CategoryGroup or Category.");
"Class parameter for loadCGCIHierarchy() must be CategoryGroup or Category, not "+arg0);
    public Object loadCGCIHierarchy(final Class arg0, final int arg1) {        // CONTRACT        if (!CategoryGroup.class.equals(arg0) && !Category.class.equals(arg0)) {            throw new IllegalArgumentException(                    "Class parameter for loadCGCIHierarchy() must be CategoryGroup or Category.");        }        return clean(containerDao.loadHierarchy(arg0, arg1));    }