def METHOD_NAME(self):
    self.new_timestamp = (
        self.base_timestamp + relativedelta(years=200)
    ).isoformat()
    self.delete = True
    self.init_mock_loader()
    importer = Importer(self.loader, force_singlethread=True)
    importer.update(self.body_id)
    for table, count in self.tables.items():
        # It doesn't make sense if our Body was deleted
        if table == Body:
            continue
        # We use minus one because we only deleted the top level objects
        self.assertEqual(
            table.objects.count(), count - 1, f"{table} {table.objects.all()}"
        )