public function broadcast($msg, array $exclude = array(), array $eligible = array()) {
        $useEligible = (bool)count($eligible);
        foreach ($this->subscribers as $client) {
            if (in_array($client->WAMP->sessionId, $exclude)) {
                continue;
            }

            if ($useEligible && !in_array($client->WAMP->sessionId, $eligible)) {
                continue;
            }

            $client->event($this->id, $msg);
        }

        return $this;
    }