code: def model_name():
      yield "gpt_fast_handler"
  
imports: import json
  import shutil
  import sys
  from pathlib import Path
  from string import Template
  from unittest.mock import patch
  import pytest
  import requests
  import test_utils
  import torch
  import yaml
  from model_archiver.model_archiver_config import ModelArchiverConfig
  from ts.torch_handler.unit_tests.test_utils.mock_context import MockContext
label_desc: Use image node_id 4 for calling a global function with example usage: model_name() without return types