code: def teardown_method(self):
      with create_session() as session:
          session.query(TI).delete()
  
imports: from __future__ import annotations
  import json
  from tempfile import NamedTemporaryFile
  from unittest import mock
  import pytest
  from airflow.models import DAG, TaskInstance
  from airflow.providers.google.marketing_platform.operators.campaign_manager import GoogleCampaignManagerBatchInsertConversionsOperator, GoogleCampaignManagerBatchUpdateConversionsOperator, GoogleCampaignManagerDeleteReportOperator, GoogleCampaignManagerDownloadReportOperator, GoogleCampaignManagerInsertReportOperator, GoogleCampaignManagerRunReportOperator
  from airflow.utils import timezone
  from airflow.utils.session import create_session
label_desc: Use image node_id 2 for calling the TestGoogleCampaignManagerDownloadReportOperator obj's underlying member method code with example usage: obj.teardown_method() without return types