code: def region_name(sagemaker_session):
      return sagemaker_session.boto_session.region_name
  
imports: from __future__ import absolute_import
  import json
  import os
  import re
  import tempfile
  import time
  import shutil
  from contextlib import contextmanager
  import pytest
  import pandas
  from sagemaker.utils import retry_with_backoff
  from tests.integ.sagemaker.workflow.helpers import wait_pipeline_execution
  from tests.integ.s3_utils import extract_files_from_s3
  from sagemaker.workflow.model_step import ModelStep, _REGISTER_MODEL_NAME_BASE, _REPACK_MODEL_NAME_BASE
  from sagemaker.parameter import IntegerParameter
  from sagemaker.pytorch import PyTorch, PyTorchModel
  from sagemaker.tuner import HyperparameterTuner
  from tests.integ.timeout import timeout
  from sagemaker.session import Session
  from sagemaker import image_uris
  from sagemaker.estimator import Estimator
  from sagemaker.inputs import CreateModelInput, TrainingInput
  from sagemaker.model import Model
  from sagemaker.model_metrics import MetricsSource, ModelMetrics
  from sagemaker.processing import ProcessingInput, ProcessingOutput, FeatureStoreOutput, ScriptProcessor
  from sagemaker.s3 import S3Uploader
  from sagemaker.session import get_execution_role
  from sagemaker.sklearn.estimator import SKLearn
  from sagemaker.transformer import Transformer
  from sagemaker.sklearn.processing import SKLearnProcessor
  from sagemaker.workflow.conditions import ConditionGreaterThanOrEqualTo, ConditionLessThanOrEqualTo
  from sagemaker.workflow.condition_step import ConditionStep
  from sagemaker.workflow.callback_step import CallbackStep, CallbackOutput, CallbackOutputTypeEnum
  from sagemaker.wrangler.processing import DataWranglerProcessor
  from sagemaker.dataset_definition.inputs import DatasetDefinition, AthenaDatasetDefinition
  from sagemaker.workflow.execution_variables import ExecutionVariables
  from sagemaker.workflow.functions import Join, JsonGet
  from sagemaker.wrangler.ingestion import generate_data_ingestion_flow_from_s3_input
  from sagemaker.workflow.parameters import ParameterInteger, ParameterString
  from sagemaker.workflow.steps import CreateModelStep, ProcessingStep, TrainingStep, TransformStep, TransformInput, PropertyFile, TuningStep
  from sagemaker.workflow.step_collections import RegisterModel
  from sagemaker.workflow.pipeline import Pipeline
  from sagemaker.workflow.utilities import hash_files_or_dirs
  from sagemaker.feature_store.feature_group import FeatureGroup, FeatureDefinition, FeatureTypeEnum
  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