private function getClient()
    {
        if (null !== $this->client) {
            return $this->client;
        }

        try {
            return $this->client = new \SoapClient(static::ENDPOINT);
        } catch (\SoapFault $oExcept) {
            if ($this->debug) {
                @trigger_error('Failed to connect to the europa web service: ' . $oExcept->getMessage());
            }
        }

        return $this->client = null;
    }