class_docstr: A object that dereferences itself during deserialization
code: def __init__(self, ref: ray.ObjectRef):
      self.ref = ref
  
imports: import collections
  import io
  import logging
  import re
  import string
  import sys
  import weakref
  from dataclasses import make_dataclass
  import numpy
  import pytest
  from numpy import log
  import ray
  import ray.cluster_utils
label_desc: Use image node_id 1 to create a new _SelfDereferenceObject object  with example: obj = _SelfDereferenceObject(ref)