code: def test_low_level_zero_checkpointIO():
      spawn(run_dist, 2)
  
file_path: ColossalAI/tests/test_checkpoint_io/test_low_level_zero_checkpoint_io.py
imports: import torch
  import torch.distributed
  from torchvision.models import resnet18
  from utils import shared_tempdir
  import colossalai
  from colossalai.booster import Booster
  from colossalai.booster.plugin import LowLevelZeroPlugin
  from colossalai.nn.optimizer import HybridAdam
  from colossalai.testing import check_state_dict_equal, clear_cache_before_run, parameterize, rerun_if_address_is_in_use, spawn
  from colossalai.zero import LowLevelZeroOptimizer
label_desc: Use image node_id 3 for calling a global function with example usage: test_low_level_zero_checkpointIO() without return types