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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 __get_query_agg_terms(cls, field, agg_id=None):
 """ Create a es_dsl aggregation object based on a term. :param field: field to be used to aggregate :return: a tuple with the aggregation id and es_dsl aggregation object. Ex: { "terms": { "field": <field>, "size:": <size>, "order":{ "_count":"desc" } } Which will then be used as Search.aggs.bucket(agg_id, query_agg) method to add aggregations to the es_dsl Search object """

        if not agg_id:
            agg_id = cls.AGGREGATION_ID
        query_agg = A("terms", field=field, size=cls.AGG_SIZE, order={"_count": "desc"})
        return (agg_id, query_agg)