code: public void doDelete(String url, HttpResponse result, Map<String, Object> headers, String contentType) {
          httpClient.delete(url, result, headers, contentType);
      }
docs: Performs DELETE to supplied url of result's request.
  @param url url to delete.
  @param result result containing request, its response will be filled.
  @param headers headers to add.
  @param contentType contentType for request.