code: private CloseableHttpResponse executeInitializrMetadataRetrieval(String url) {
  		HttpGet request = new HttpGet(url);
  		request.setHeader(new BasicHeader(HttpHeaders.ACCEPT, ACCEPT_META_DATA));
  		return execute(request, url, "retrieve metadata");
  	}
docs: Retrieves the meta-data of the service at the specified URL.
  @param url the URL
  @return the response