Helping function of `_parse_features` that parses a tuple.

def _parse_tuple(features, new_names):
        """Helping function of `_parse_features` that parses a tuple."""
        name_idx = 1
        try:
            feature_type = FeatureType(features[0])
        except ValueError:
            feature_type = None
            name_idx = 0

        if feature_type and not feature_type.has_dict():
            return OrderedDict([(feature_type, ...)])
        return OrderedDict([(feature_type, FeatureParser._parse_names_tuple(features[name_idx:], new_names))])