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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _parse_names_set(feature_names):

 """Helping function of `_parse_feature_names` that parses a set of feature names."""

        feature_collection = OrderedDict()
        for feature_name in feature_names:
            if isinstance(feature_name, str):
                feature_collection[feature_name] = ...
            else:
                raise ValueError('Failed to parse {}, expected string'.format(feature_name))
        return feature_collection