XSJS and OData-Batch result consuming

Hello,

I've got some problems regarding the consuming of Batch-Responses of OData. I've successful send out an OData Batch request via POST to $Batch;

The returned request however seems to be inaccessible to me in XSJS (this is just a shortened example!):

HTTP/1.1 200 OK
Date: Tue, 17 Mar 2015 17:12:37 GMT
Server: Apache/2.4.7 (Unix)
OData-Version: 4.0
Content-Length: 455
Content-Type: multipart/mixed; boundary=batchresponse_idcdnaCy-dI6D-MOde-391O-3CTLb0Gk1Glf
--batchresponse_idcdnaCy-dI6D-MOde-391O-3CTLb0Gk1Glf
Content-Type: application/http
Content-Transfer-Encoding: binary
HTTP/1.1 400 Bad Request
Content-Type: application/json;odata.metadata=minimal;charset=utf-8
Content-Length: 160
{
"error" : {
"code" : -1000,
"message" : {
"lang" : "en-us",
"value" : "Property 'U_test' of 'Item' is invalid"
}
}
}
--batchresponse_idcdnaCy-dI6D-MOde-391O-3CTLb0Gk1Glf--

This seems a quite easy task, yet I cant access the content of the body, e.g.:

var client = new $.net.http.Client();
response = client.request(b1request, b1slDest).getResponse();
$.response.setBody(response.status + " \n-\n " + JSON.stringify(response.headers)        + "\n-\n" + JSON.stringify(response.entities) + "\n-\n" + response.contentType        + "\n-\n" + JSON.stringify(response.body));

and it returns:

200
-
{"0":{"name":"~response_line","value":"HTTP/1.1 200 OK"},"1":{"name":"~server_protocol","value":"HTTP/1.1"},"2":{"name":"~status_code","value":"200"},"3":{"name":"~status_reason","value":"OK"},"4":{"name":"date","value":"Tue, 17 Mar 2015 17:29:16 GMT"},"5":{"name":"server","value":"Apache/2.4.7 (Unix)"},"6":{"name":"odata-version","value":"4.0"},"7":{"name":"content-length","value":"455"},"8":{"name":"content-type","value":"multipart/mixed; boundary=batchresponse_HR17MOOa-eebB-kJ1s-6HT8-h5yG3uEzbuwM"}}
-
{"0":{}}
-
multipart/mixed; boundary=batchresponse_HR17MOOa-eebB-kJ1s-6HT8-h5yG3uEzbuwM
-
undefined

So where is my body? How can I access the interesting part that is returned within the batch response? According to the XSJSDoc there are no more fields to access? (JSDoc: Class: WebResponse)

Best Regards,

KB