code: def value(self):
      return self.n
  
file_path: ray/python/ray/tests/test_placement_group_failover.py
imports: import pytest
  import sys
  import ray
  import ray.cluster_utils
  from ray._private.test_utils import get_other_nodes, wait_for_condition
label_desc: Use image node_id 2 for calling the Actor obj's underlying member method code with example usage: obj.value() and returns: self