public function convertToString($dom){
		$html = $this->html5->saveHTML($dom);
		$html = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>'."\n".$html;
		// Library HTML5 always drop xmlns.
		$html = str_replace('<html', '<html xmlns="http://www.w3.org/1999/xhtml"', $html);
		// Convert entities
		$html = str_replace('&nbsp;', '&#160;', $html);
		// Remove srcset
		$html = preg_replace('/srcset="[^"]*"/', '', $html);
		// Remove rt
		$html = preg_replace('/<rp>[^<]*?<\/rp>/', '', $html);
		// Remove align
		$html = preg_replace('/align="(center|right|left)"/', 'class="text-$1"', $html);
		// fix close tag
		$html = preg_replace('/<(meta|link|img|br|param|hr)([^>]*)?>/u', '<$1$2 />', $html);
		return $html;
	}