public function isProxyListAllowed(array $proxies)
    {
        phpCAS::traceBegin();
        if (empty($proxies)) {
            phpCAS::trace("No proxies were found in the response");
            phpCAS::traceEnd(true);
            return true;
        } elseif (!$this->isProxyingAllowed()) {
            phpCAS::trace("Proxies are not allowed");
            phpCAS::traceEnd(false);
            return false;
        } else {
            $res = $this->contains($proxies);
            phpCAS::traceEnd($res);
            return $res;
        }
    }