code: def __init__(self, client_id, id):
      self.client_id = client_id
      self.id = id
  
file_path: ray/python/ray/util/client/server/server_stubs.py
imports: from contextlib import contextmanager
  from abc import ABC
  from abc import abstractmethod
label_desc: Use image node_id 1 to create a new ClientReferenceSentinel object from inherited base classes: ABC with example: obj = ClientReferenceSentinel(client_id, id)