code: def get_real_ref_from_server(self):
      global _current_server
      if _current_server is None:
          return None
      client_map = _current_server.client_side_ref_map.get(
          self.client_id, None
      )
      if client_map is None:
          return None
      return client_map.get(self.id, None)
  
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 4 for calling the ClientReferenceSentinel obj's underlying member method code with example usage: obj.get_real_ref_from_server() and returns: client_map, None, None