}

    public boolean hasRoles(final String[] acceptedRoles) {
        return stream(user.getRoleNames())
                .get(stream -> stream.anyMatch(s1 -> stream(acceptedRoles).get(s3 -> s3.anyMatch(s2 -> s2.equals(s1)))));
    }

    public boolean hasGroup(final String group) {
        return stream(user.getGroupNames()).get(stream -> stream.anyMatch(s -> s.equals(group)));
    }