public function findClasses($subDir = null, $suffix = null, $parent = null, $reflection = false)
    {
        $classes = [];
        foreach ($this->bundles as $bundle) {
            $this->setRootDirectory($bundle->getPath());
            $this->setRootNamespace($bundle->getNamespace());
            $classes = array_merge($classes, parent::findClasses($subDir, $suffix, $parent, $reflection));
        }
        return $classes;
    }