class_docstr: A object that dereferences itself during deserialization
code: def __reduce__(self):
      return ray.get, (self.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 2 for calling the _SelfDereferenceObject obj's underlying member method code with example usage: obj.__reduce__() and returns: ray,  self