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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 save_offsets( cls, consumer_offsets_metadata, topics_dict, json_file, groupid, ):
 """Built offsets for given topic-partitions in required format from current offsets metadata and write to given json-file. :param consumer_offsets_metadata: Fetched consumer offsets from kafka. :param topics_dict: Dictionary of topic-partitions. :param json_file: Filename to store consumer-offsets. :param groupid: Current consumer-group. """

        # Build consumer-offset data in desired format
        current_consumer_offsets = defaultdict(dict)
        for topic, topic_offsets in six.iteritems(consumer_offsets_metadata):
            for partition_offset in topic_offsets:
                current_consumer_offsets[topic][partition_offset.partition] = \
                    partition_offset.current
        consumer_offsets_data = {'groupid': groupid, 'offsets': current_consumer_offsets}

        cls.write_offsets_to_file(json_file, consumer_offsets_data)