code: def _setup_handler(self, **handler_kwargs):
      self.transport_mock = mock.MagicMock()
      handler_kwargs = {
          "transport": self.transport_mock,
          **handler_kwargs,
      }
      stackdriver_task_handler = StackdriverTaskHandler(
          **handler_kwargs
      )
      self.logger = logging.getLogger("logger")
      self.logger.addHandler(stackdriver_task_handler)
      return stackdriver_task_handler
  
imports: from __future__ import annotations
  import logging
  from unittest import mock
  from urllib.parse import parse_qs, urlsplit
  import pytest
  from google.cloud.logging import Resource
  from google.cloud.logging_v2.types import ListLogEntriesRequest, ListLogEntriesResponse, LogEntry
  from airflow.providers.google.cloud.log.stackdriver_task_handler import StackdriverTaskHandler
  from airflow.utils import timezone
  from airflow.utils.state import TaskInstanceState
  from tests.test_utils.db import clear_db_dags, clear_db_runs
label_desc: Use image node_id 2 for calling the TestStackdriverLoggingHandlerTask obj's underlying member method code with example usage: obj._setup_handler() and returns: stackdriver_task_handler