class_docstr: Strategy that handles communication on a single device.
code: def is_global_zero(self) -> bool:
      return True
  
imports: from __future__ import annotations
  from typing import Any
  import torch
  from torch import Tensor
  from typing_extensions import override
  import lightning.pytorch
  from lightning.fabric.plugins import CheckpointIO
  from lightning.fabric.strategies import _StrategyRegistry
  from lightning.fabric.utilities.types import _DEVICE
  from lightning.pytorch.plugins.precision import Precision
  from lightning.pytorch.strategies.strategy import Strategy, TBroadcast
label_desc: Use image node_id 7 for calling the SingleDeviceStrategy obj's underlying member method code with example usage: obj.is_global_zero() and returns: True