code: def _default_device():
      return (
          torch.device("cuda:0")
          if torch.cuda.is_available()
          else torch.device("cpu")
      )
  
file_path: ColossalAI/colossalai/_analyzer/fx/tracer/symbolic_trace.py
imports: from typing import Any, Callable, Dict, Optional, Union
  import torch
  from torch.fx import Tracer
  from torch.utils._pytree import tree_map
  from colossalai._analyzer._subclasses import MetaTensor
  from ..graph_module import ColoGraphModule
  from .tracer import ColoTracer
label_desc: Use image node_id 1 for calling a global function with example usage: _default_device() and returns: unknown