public function glob($pattern)
    {
        // $pattern = 'Media'.DIRECTORY_SEPARATOR.'*'
        $wrappers = $this->getStreamWrapperClassname('BackBee\ClassContent', 'bb.class');
        if (0 == count($wrappers)) {
            return false;
        }

        $classnames = array();
        foreach ($wrappers as $classname) {
            $wrapper = new $classname();
            if (false !== $matchingclass = $wrapper->glob($pattern)) {
                $classnames = array_merge($classnames, $matchingclass);
            }
        }

        if (0 == count($classnames)) {
            return false;
        }

        return array_unique($classnames);
    }