code: def role_arn():
      return "arn:role"
  
imports: from __future__ import absolute_import
  import pytest
  from sagemaker.remote_function.job import _JobSettings
  from sagemaker.workflow.function_step import step
  from sagemaker.workflow.step_outputs import get_step
  from sagemaker.workflow.pipeline import Pipeline, PipelineGraph
  from sagemaker.workflow.condition_step import ConditionStep
  from sagemaker.workflow.conditions import ConditionEquals, ConditionIn, ConditionNot, ConditionOr, ConditionGreaterThan
  from sagemaker.workflow.execution_variables import ExecutionVariables
  from sagemaker.workflow.parameters import ParameterInteger, ParameterString
  from sagemaker.workflow._steps_compiler import CompiledStep
  from tests.unit.sagemaker.workflow.helpers import ordered, CustomStep, CustomStepCollection
label_desc: Use image node_id 2 for calling a global function with example usage: role_arn() and returns: str