public function setInnerHtml($content)
    {
        $content = self::create($content);
        foreach ($this as $node) {
            $node->nodeValue = '';
            foreach ($content as $newnode) {
                /** @var \DOMNode $node */
                /** @var \DOMNode $newnode */
                $newnode = static::importNewnode($newnode, $node);
                $node->appendChild($newnode);
            }
        }
        return $this;
    }