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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 all(cls, client, **kwargs):
 """ fetch all option positions """

        max_date = kwargs['max_date'] if 'max_date' in kwargs else None
        max_fetches = \
            kwargs['max_fetches'] if 'max_fetches' in kwargs else None

        url = 'https://api.robinhood.com/options/positions/'
        params = {}
        data = client.get(url, params=params)
        results = data["results"]

        if is_max_date_gt(max_date, results[-1]['updated_at'][0:10]):
            return results
        if max_fetches == 1:
            return results

        fetches = 1
        while data["next"]:
            fetches = fetches + 1
            data = client.get(data["next"])
            results.extend(data["results"])
            if is_max_date_gt(max_date, results[-1]['updated_at'][0:10]):
                return results
            if max_fetches and (fetches >= max_fetches):
                return results
        return results