code: public String getResponseBody() {
          String responseStr = "";
          if (lastResponseStream == null) {
              logger.error("Unable to parse JSON from empty response!");
          } else {
              Scanner s = new Scanner(lastResponseStream);
              s.useDelimiter("\\A");
              responseStr = (s.hasNext()) ? s.next() : "";
              s.close();
          }
          return responseStr;
      }
docs: Returns the last response stream as a string.
  
  @return String