code: def list_services(_):
      print("\n".join(_load().keys()))
  
file_path: nni/nni/tools/nnictl/ts_management.py
imports: import importlib
  import json
  from nni.runtime.config import get_config_file
  from .common_utils import print_error, print_green
label_desc: Use image node_id 3 for calling a global function with example usage: list_services(_) without return types