private boolean atForOrAsyncFor() {
    if (atToken(PyTokenTypes.FOR_KEYWORD)) {
      return true;
    }
    else if (matchToken(PyTokenTypes.ASYNC_KEYWORD)) {
      if (atToken(PyTokenTypes.FOR_KEYWORD)) {
        return true;
      }
      else {
        myBuilder.error(message("for.expected"));
        return false;
      }
    }
    return false;
  }
private boolean atForOrAsyncFor()