code: private final String getString(NamedList<Object> response, String... args) {
      Object objectItem = response.findRecursive(args);
      if (objectItem != null && objectItem instanceof String) {
        return (String) objectItem;
      } else {
        return null;
      }
    }
docs: Gets the string.
  
  @param response
  the response
  @param args
  the args
  @return the string