/// <summary>
 /// Gets the post body for sending a request.
 /// </summary>
 /// <param name="operations">The list of operations.</param>
 /// <returns>The POST body, for using in the web request.</returns>
 private string GetPostBody(Operation[] operations)
 {
     BatchJobMutateRequest request = new BatchJobMutateRequest() {
     operations = operations.ToArray()
       };
       return SerializationUtilities.SerializeAsXmlText(request);
 }