code: def _dummy_get_credentials(self):
      pass
  
imports: from __future__ import annotations
  from unittest import mock
  import pytest
  from google.cloud.run_v2 import CreateJobRequest, GetJobRequest, Job, ListJobsRequest, RunJobRequest, UpdateJobRequest
  from airflow.exceptions import AirflowException
  from airflow.providers.google.cloud.hooks.cloud_run import CloudRunAsyncHook, CloudRunHook
  from tests.providers.google.cloud.utils.base_gcp_mock import mock_base_gcp_hook_default_project_id
label_desc: Use image node_id 2 for calling the TestCloudRunAsyncHook obj's underlying member method code with example usage: obj._dummy_get_credentials() without return types