public RawAPIResponse callGetAPI(String relativeUrl, HttpParameter... parameters) throws FacebookException {
        ensureAuthorizationEnabled();

        String path = relativeUrl;
        if (relativeUrl.startsWith("/")) {
            path = relativeUrl.substring(1);
        }

        // not supports "JSONStore" option because this method returns the json object itself.
        HttpResponse res = get(buildEndpoint(path), parameters);
        return new RawAPIResponseImpl(res);
    }