code: @Override
      public String loadDataFromNetwork() throws Exception {
          try {
              Ln.d("Call web service " + url);
              OkUrlFactory urlFactory = new OkUrlFactory(getOkHttpClient());
              HttpURLConnection connection = urlFactory.open(new URL(url));
              return IOUtils.toString(connection.getInputStream());
          } catch (final MalformedURLException e) {
              Ln.e(e, "Unable to create URL");
              throw e;
          } catch (final IOException e) {
              Ln.e(e, "Unable to download content");
              throw e;
          }
      }
docs: will be invoked in remote service