empty body in response

[Daenu]

Hello I am really enjoing using your laravel soap client.
But shortly I run into a problem with a soap response where the body is a node with a base64binary in it:

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><CreateAusweisDokumentResponse xmlns="http://innosolv.ch/webservices/"><CreateAusweisDokumentResult>JVBERi0xLjcNCiXi48/TDQoxIDAgb2JqDQo8PA0KL1R5cGUgL0NhdGFs.........</CreateAusweisDokumentResult></CreateAusweisDokumentResponse></s:Body></s:Envelope>

Is it possible to handle this response and get the correct body not an emtpy string?

The Code:

try {
    $responseDoc = Soap::baseWsdl($this->location . "/HelperService?singleWSDL")
        ->withBasicAuth($this->username, $this->password)
        ->withOptions($options)
        ->call('CreateAusweisDokument', [$doc])
        ->throw();
} catch (RequestException $e) {
    return ["error" => 500, "message" => $e->getMessage()];
}

dd($responseDoc->body());