WSDL\XML\XMLSoapVersion\XMLSoapVersion::getTagFor PHP Method

    public static function getTagFor($version)
    {
        switch ($version) {
            case BindingType::SOAP_11:
                return 'soap';
            case BindingType::SOAP_12:
                return 'soap12';
            default:
                throw new Exception('Unsupported soap version [' . $version . ']');
        }
    }

 public function setUp()
 {
     parent::setUp();
     $this->DOMDocument = new DOMDocument();
     $this->XMLUse = XMLUseFactory::create($this->useType());
     $this->soapVersion = XMLSoapVersion::getTagFor(BindingType::SOAP_11);
 }