:param dict_: dict of OrderedDict to be processed
        :return: list of str of keys in the original order
            or in alphabetical order

def _ordered_keys(dict_):
        """
        :param dict_: dict of OrderedDict to be processed
        :return: list of str of keys in the original order
            or in alphabetical order
        """
        return isinstance(dict_, OrderedDict) and dict_.keys() or \
               dict_ and sorted(dict_.keys()) or []