code: def test_create_sdf_download_tasks_called_once(
      self, get_conn_to_display_video
  ):
      body_request = {
          "version": "version",
          "partnerId": "partner_id",
          "advertiserId": "advertiser_id",
          "parentEntityFilter": "parent_entity_filter",
          "idFilter": "id_filter",
          "inventorySourceFilter": "inventory_source_filter",
      }
  
      self.hook.create_sdf_download_operation(body_request=body_request)
  
      get_conn_to_display_video.return_value.sdfdownloadtasks.return_value.create.assert_called_once()
  
imports: from __future__ import annotations
  from unittest import mock
  from airflow.providers.google.marketing_platform.hooks.display_video import GoogleDisplayVideo360Hook
  from tests.providers.google.cloud.utils.base_gcp_mock import mock_base_gcp_hook_default_project_id
label_desc: Use image node_id 16 for calling the TestGoogleDisplayVideo360Hook obj's underlying member method code with example usage: obj.test_create_sdf_download_tasks_called_once(get_conn_to_display_video) without return types