code: def get_location(self) -> str:
      return self.node_id
  
imports: import collections
  import time
  import pytest
  import ray
  from ray.data._internal.compute import ActorPoolStrategy
  from ray.data._internal.execution.operators.actor_pool_map_operator import AutoscalingConfig, AutoscalingPolicy, _ActorPool
  from ray.data._internal.execution.util import make_ref_bundles
  from ray.tests.conftest import *
label_desc: Use image node_id 2 for calling the PoolWorker obj's underlying member method code with example usage: obj.get_location() and returns: self