public Map<String, Boolean> block(String pageId, List<String> userIds) throws FacebookException {
        ensureAuthorizationEnabled();
        String _userIds = z_F4JInternalStringUtil.join(userIds.toArray(new String[userIds.size()]), ",");
        HttpResponse res = post(buildEndpoint(pageId, "blocked"), new HttpParameter[]{new HttpParameter("uid", _userIds)});
        Map<String, Boolean> blocks = new HashMap<String, Boolean>();
        JSONObject jsonObject = res.asJSONObject();
        Iterator<String> uids = jsonObject.keys();
        while (uids.hasNext()) {
            String uid = uids.next();
            boolean result = getBoolean(uid, jsonObject);
            blocks.put(uid, result);
        }
        return blocks;
    }