code: def test_model_packaging_and_start():
      subprocess.run("mkdir model_store", shell=True)
      subprocess.run(
          "torch-model-archiver -f --model-name onnx --version 1.0 --serialized-file linear.onnx --export-path model_store --handler onnx_handler.py",
          shell=True,
          check=True,
      )
  
file_path: serve/test/pytest/test_onnx.py
imports: import subprocess
  import torch
  import torch.onnx
label_desc: Use image node_id 2 for calling a global function with example usage: test_model_packaging_and_start() without return types