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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 load_page(self, payload):
 """ Parses the collection of records out of a list payload. :param dict payload: The JSON-loaded content. :return list: The list of records. """

        if 'meta' in payload and 'key' in payload['meta']:
            return payload[payload['meta']['key']]
        else:
            keys = set(payload.keys())
            key = keys - self.META_KEYS
            if len(key) == 1:
                return payload[key.pop()]

        raise TwilioException('Page Records can not be deserialized')