code: def region_name(sagemaker_session):
      return sagemaker_session.boto_session.region_name
  
imports: from __future__ import absolute_import
  import json
  import numpy
  import pytest
  import os
  import random
  from sagemaker import get_execution_role, utils
  from sagemaker.config import load_sagemaker_config
  from sagemaker.processing import ProcessingInput
  from sagemaker.remote_function.errors import RemoteFunctionError
  from sagemaker.sklearn import SKLearnProcessor
  from sagemaker.remote_function.core.serialization import CloudpickleSerializer
  from sagemaker.s3 import S3Uploader
  from sagemaker.s3_utils import s3_path_join
  from sagemaker.workflow.conditions import ConditionLessThan
  from sagemaker.workflow.fail_step import FailStep
  from sagemaker.workflow.function_step import step
  from sagemaker.workflow.condition_step import ConditionStep
  from sagemaker.workflow.conditions import ConditionEquals
  from sagemaker.workflow.pipeline import Pipeline
  from sagemaker.workflow.parameters import ParameterString, ParameterInteger, ParameterFloat, ParameterBoolean
  from sagemaker.workflow.step_outputs import get_step
  from sagemaker.workflow.steps import ProcessingStep
  from tests.integ.sagemaker.workflow.helpers import create_and_execute_pipeline, wait_pipeline_execution
  from tests.integ import DATA_DIR
label_desc: Use image node_id 2 for calling a global function with example usage: region_name(sagemaker_session) and returns: sagemaker_session