WsdlToPhp\PackageGenerator\Tests\DomHandler\DomDocumentHandlerTest::bingInstance PHP Method

    public static function bingInstance()
    {
        if (!isset(self::$bingInstance)) {
            $doc = new \DOMDocument('1.0', 'utf-8');
            $doc->load(self::wsdlBingPath());
            self::$bingInstance = new DomDocumentHandler($doc);
        }
        return self::$bingInstance;
    }

 /**
  *
  */
 public function testGetNamespaceNull()
 {
     $domDocument = DomDocumentHandlerTest::bingInstance();
     // first element tag
     $element = $domDocument->getElementByName('element');
     $this->assertNull($element->getAttribute(AbstractAttributeHandler::ATTRIBUTE_MIN_OCCURS)->getNamespace());
 }