*/
public File updateFolder(File folder) throws ClientServicesException{
String accessType = AccessType.AUTHENTICATED.getText();
String requestUri = FileUrls.COLLECTION_ENTRY.format(this, FileUrlParts.accessType.get(accessType),
FileUrlParts.folderId.get(folder.getFileId()));
String payload = new FileSerializer(folder).generateFileUpdatePayload();
Map<String, String> headers = new HashMap<String, String>();
headers.put(Headers.ContentType, Headers.ATOM);
Response response = updateData(requestUri, null, headers, payload, null);
checkResponseCode(response, HTTPCode.OK);