Carew\Twig\CarewExtension::renderDocumentToc PHP Method

    public function renderDocumentToc(\Twig_Environment $twig, $toc = null, $deep = 0)
    {
        if (null === $toc) {
            $toc = $this->getCarewGlobals($twig)->document;
        }
        if (is_object($toc) && $toc instanceof Document) {
            $toc = $toc->getToc();
        }
        if (!is_array($toc)) {
            throw new \InvalidArgumentException('First argument given to render_document_toc must be a Document or an array of TOC');
        }
        if (1 == count($toc)) {
            $first = reset($toc);
            if (!isset($first['title'])) {
                $toc = $first['children'];
            }
        }
        $parameters = array('children' => $toc, 'deep' => $deep);
        return $this->renderBlock($twig, 'document_toc', $parameters);
    }