public Task<HttpResponseMessage> Delete(CancellationToken token)
{
var uri = new Uri(string.Format(PARSE_ROOT_URL + (_className.ToLowerInvariant() == "files" ? "/{0}/{1}" : "/classes/{0}/{1}"), _className, _criteria));
var request = new HttpRequestMessage(HttpMethod.Delete, uri);
return _client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, token);
}