public function getBatch($namespace)
    {
        if (!$this->finalized) {
            $this->autoFinalize();
        }
        $full = $this->getAll();
        if (!isset($full[$namespace])) {
            $this->triggerError(
                'Cannot retrieve undefined namespace ' .
                htmlspecialchars($namespace),
                E_USER_WARNING
            );
            return;
        }
        return $full[$namespace];
    }