code: def skip_tracker():
      skip_tracker = SkipTracker()
      with use_skip_tracker(skip_tracker):
          yield skip_tracker
  
file_path: fairscale/tests/nn/pipe/skip/test_stash_pop.py
imports: import pytest
  import torch
  from torch import nn
  from fairscale.nn.pipe.skip import pop, skippable, stash
  from fairscale.nn.pipe.skip.tracker import SkipTracker, use_skip_tracker
label_desc: Use image node_id 1 for calling a global function with example usage: skip_tracker() without return types