code: def get_placement_group(self):
      return ray.util.get_current_placement_group()
  
file_path: ray/python/ray/serve/tests/test_deployment_scheduler.py
imports: import sys
  import pytest
  import ray
  from ray._raylet import GcsClient
  from ray.serve._private.common import DeploymentID
  from ray.serve._private.default_impl import create_cluster_node_info_cache
  from ray.serve._private.deployment_scheduler import DefaultDeploymentScheduler, DeploymentDownscaleRequest, ReplicaSchedulingRequest, SpreadDeploymentSchedulingPolicy
  from ray.serve._private.utils import get_head_node_id
  from ray.tests.conftest import *
label_desc: Use image node_id 2 for calling the Replica obj's underlying member method code with example usage: obj.get_placement_group() and returns: ray