code: def _to_pinnable(obj):
      """Converts obj to a form that can be pinned in object store memory.
  
      Currently only numpy arrays are pinned in memory, if you have a strong
      reference to the array value.
      """
  
      return (obj, np.zeros(1))
  
imports: import copy
  import glob
  import inspect
  import logging
  import os
  import threading
  import time
  from collections import defaultdict
  from datetime import datetime
  from numbers import Number
  from threading import Thread
  from typing import Any, Callable, Dict, List, Optional, Sequence, Type, Union
  import numpy
  import psutil
  import ray
  from ray.util.annotations import DeveloperAPI, PublicAPI
  from ray.air._internal.json import SafeFallbackEncoder
  from ray.air._internal.util import is_nan, is_nan_or_inf
  from ray._private.dict import merge_dicts, deep_update, flatten_dict, unflatten_dict, unflatten_list_dict, unflattened_lookup
label_desc: Use image node_id 4 for calling a global function with example usage: _to_pinnable(obj) and returns: obj,  np