code: def __init__(self, var: str, default: Optional[str] = None):
      self._var = var
      self._default = default
  
imports: import collections
  import hashlib
  import json
  import os
  import random
  import string
  import subprocess
  import time
  from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple
  import requests
  from ray_release.logger import logger
label_desc: Use image node_id 1 to create a new DeferredEnvVar object  with example: obj = DeferredEnvVar(var, default)