code: def register_objectrefs(self, map_refs, reduce_refs):
      self.map_refs = map_refs
      self.reduce_refs = reduce_refs
  
imports: import sys
  import random
  import string
  import ray
  import pytest
  import time
  from ray.experimental import shuffle
  from ray.tests.conftest import _ray_start_chaos_cluster
  from ray.data._internal.progress_bar import ProgressBar
  from ray.util.placement_group import placement_group
  from ray._private.test_utils import NodeKillerActor, get_log_message, get_and_run_resource_killer, WorkerKillerActor, wait_for_condition
  from ray.exceptions import RayTaskError, ObjectLostError
  from ray.util.state.common import ListApiOptions, StateResource
  from ray.util.state.api import StateApiClient, list_nodes
  from ray.cluster_utils import AutoscalingCluster
label_desc: Use image node_id 2 for calling the ShuffleStatusTracker obj's underlying member method code with example usage: obj.register_objectrefs(map_refs, reduce_refs) without return types