code: def region_name(sagemaker_session):
      return sagemaker_session.boto_session.region_name
  
imports: from __future__ import absolute_import
  import json
  import logging
  import os
  import pytest
  from tests.integ.sagemaker.workflow.helpers import wait_pipeline_execution
  from sagemaker.clarify import BiasConfig, DataConfig
  from sagemaker.s3 import S3Uploader, S3Downloader
  from sagemaker.workflow.clarify_check_step import DataBiasCheckConfig
  from sagemaker.workflow.monitor_batch_transform_step import MonitorBatchTransformStep
  from sagemaker.workflow.model_step import ModelStep
  from sagemaker.workflow.parameters import ParameterString
  from tests.integ import DATA_DIR
  from sagemaker.model_monitor import DatasetFormat, Statistics, Constraints
  from sagemaker.xgboost import XGBoostModel
  from sagemaker.transformer import Transformer
  from sagemaker import get_execution_role, utils
  from sagemaker.workflow.pipeline import Pipeline
  from sagemaker.workflow.check_job_config import CheckJobConfig
  from tests.integ.retry import retries
  from sagemaker.workflow.quality_check_step import DataQualityCheckConfig, ModelQualityCheckConfig
label_desc: Use image node_id 2 for calling a global function with example usage: region_name(sagemaker_session) and returns: sagemaker_session