code: def retry_dunder_call_accept_old_params(fn):
      
      @_utils.wraps(fn)
      def new_fn(self, attempt=_unset, retry_state=None):
          if retry_state is None:
              from tenacity import RetryCallState
              if attempt is _unset:
                  raise _make_unset_exception('retry', attempt=attempt)
              retry_state_passed_as_non_kwarg = (
                  attempt is not _unset and
                  isinstance(attempt, RetryCallState))
              if retry_state_passed_as_non_kwarg:
                  retry_state = attempt
              else:
                  warn_about_dunder_non_retry_state_deprecation(fn, stacklevel=2)
                  retry_state = RetryCallState(None, None, (), {})
                  retry_state.outcome = attempt
          return fn(self, retry_state=retry_state)
      return new_fn
docs: Decorate cls.__call__ method to accept old "retry" signature.