public function getTypes()
    {
        if ($this->getWsdl() == null) {
            require_once 'Zend/Soap/Client/Exception.php';
            throw new Zend_Soap_Client_Exception('\'getTypes\' method is available only in WSDL mode.');
        }

        $soapClient = $this->getSoapClient();

        return $soapClient->__getTypes();
    }