PHPePub\Core\Structure\OPF\Manifest::finalize PHP Method

    function finalize($bookVersion = EPub::BOOK_VERSION_EPUB2)
    {
        $manifest = "\n\t<manifest>\n";
        foreach ($this->items as $item) {
            /** @var $item Item */
            $manifest .= $item->finalize($bookVersion);
        }
        return $manifest . "\t</manifest>\n";
    }