code: def ray(n):
      test_working_dir = os.path.dirname(os.path.abspath(__file__))
      return Ray(n, runtime_env={"working_dir": test_working_dir})
  
imports: import os
  import time
  import pytest
  from orion.executor.base import AsyncException, ExecutorClosed, executor_factory
  from orion.executor.dask_backend import HAS_DASK, Dask
  from orion.executor.multiprocess_backend import PoolExecutor
  from orion.executor.ray_backend import HAS_RAY, Ray
  from orion.executor.single_backend import SingleExecutor
label_desc: Use image node_id 3 for calling a global function with example usage: ray(n) and returns: Ray