DiDom\Document::loadXml PHP Метод

    public function loadXml($xml, $options = 0)
    {
        return $this->load($xml, false, 'xml', $options);
    }

 public function testXmlWithOptions()
 {
     $xml = '<foo><bar></bar></foo>';
     $document = new Document();
     $document->loadXml($xml);
     $prolog = '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
     $this->assertEquals($prolog . '<foo><bar/></foo>', $document->xml());
     $this->assertEquals($prolog . '<foo><bar></bar></foo>', $document->xml(LIBXML_NOEMPTYTAG));
 }