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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_initial_status_brok(self, extra=None):
 """ Get a brok with the group properties `members` contains a list of uuid which we must provide the names. Thus we will replace the default provided uuid with the members short name. The `extra` parameter, if present, :param extra: monitoring items, used to recover members :type extra: alignak.objects.item.Items :return:Brok object :rtype: object """

        # Here members is a list of identifiers and we need their names
        if extra and isinstance(extra, Items):
            members = []
            for member_id in self.members:
                member = extra[member_id]
                members.append((member.uuid, member.get_name()))
            extra = {'members': members}

        return super(Itemgroup, self).get_initial_status_brok(extra=extra)