public function getParent()
    {
        if (!$this->currentFileName || !$this->metas) {
            return null;
        }

        $meta = $this->metas->get($this->currentFileName);

        if (!$meta || !isset($meta['parent'])) {
            return null;
        }

        $parent = $this->metas->get($meta['parent']);

        if (!$parent) {
            return null;
        }

        return $parent;
    }