docs: def vars_(object=None):
      """
      Clean all of the property starts with "_" then
      return result of vars(object).
      """
      filtered_vars = {}
      vars_dict = vars(object)
      for key, value in six.iteritems(vars_dict):
          if key.startswith("_"):
              continue
          filtered_vars[_normalize_arg_name(key)] = value
      return filtered_vars