code: def pin_in_object_store(obj):
      
  
      obj_id = ray.put(_to_pinnable(obj))
      _pinned_objects.append(ray.get(obj_id))
      return "{}{}".format(PINNED_OBJECT_PREFIX,
                           base64.b64encode(obj_id.binary()).decode("utf-8"))
docs: Pin an object in the object store.
  
      It will be available as long as the pinning process is alive. The pinned
      object can be retrieved by calling get_pinned_object on the identifier
      returned by this call.