code: def _assert_common_template_fields(template_fields):
      assert "project_id" in template_fields
      assert "region" in template_fields
      assert "gcp_conn_id" in template_fields
      assert "impersonation_chain" in template_fields
  
imports: from __future__ import annotations
  from unittest import mock
  import pytest
  from google.cloud.run_v2 import Job
  from airflow.exceptions import AirflowException, TaskDeferred
  from airflow.providers.google.cloud.operators.cloud_run import CloudRunCreateJobOperator, CloudRunDeleteJobOperator, CloudRunExecuteJobOperator, CloudRunListJobsOperator, CloudRunUpdateJobOperator
  from airflow.providers.google.cloud.triggers.cloud_run import RunJobStatus
label_desc: Use image node_id 1 for calling a global function with example usage: _assert_common_template_fields(template_fields) without return types