code: public HttpClient get(String url) throws HelloSignException {
          if (postFields != null) {
              logger.warn("POST fields set for a GET request, they will be ignored");
          }
          request = new HttpGetRequest(url, getParams, auth);
          request.execute();
          return this;
      }
docs: Initializes a GET request to the given URL.
  
  @param url String url
  @return HttpClient
  @throws HelloSignException thrown if the url is invalid