code: def _set_node_environment_variables(self) -> None:
      assert self.cluster_environment is not None
      os.environ["MASTER_ADDR"] = self.cluster_environment.main_address
      os.environ["MASTER_PORT"] = str(
          self.cluster_environment.main_port
      )
      os.environ["RANK"] = str(self.global_rank)
      os.environ["WORLD_SIZE"] = str(self.world_size)
      os.environ["LOCAL_RANK"] = str(self.local_rank)
  
imports: import argparse
  import json
  import logging
  import os
  import platform
  from contextlib import ExitStack
  from itertools import chain
  from pathlib import Path
  from typing import TYPE_CHECKING, Any, Callable, ContextManager, Dict, List, Mapping, Optional, Tuple, Union
  import torch
  from lightning_utilities.core.imports import RequirementCache
  from torch.nn import Module
  from torch.optim import Optimizer
  from typing_extensions import override
  from lightning.fabric.accelerators import Accelerator, CUDAAccelerator
  from lightning.fabric.plugins.environments.cluster_environment import ClusterEnvironment
  from lightning.fabric.plugins.precision import Precision
  from lightning.fabric.strategies.ddp import DDPStrategy
  from lightning.fabric.strategies.registry import _StrategyRegistry
  from lightning.fabric.strategies.strategy import _Sharded
  from lightning.fabric.utilities.distributed import log
  from lightning.fabric.utilities.load import _move_state_into
  from lightning.fabric.utilities.rank_zero import rank_zero_info, rank_zero_warn
  from lightning.fabric.utilities.seed import reset_seed
  from lightning.fabric.utilities.types import _PATH
label_desc: Use image node_id 19 for calling the DeepSpeedStrategy obj's underlying member method code with example usage: obj._set_node_environment_variables() without return types