protected function sendToAllConnections($command)
    {
        $this->connect();

        $args = array();
        if (func_num_args() > 1) {
            $args = func_get_args();
            array_shift($args);
        }

        $ret = array();
        foreach ($this->connections as $conn) {
            $ret[] = call_user_func_array(array($conn, $command), $args);
        }

        return $ret;
    }