code: def node_placement_to_address(pg_name, bundle_index):
      return f"ray://{pg_name}/{bundle_index}"
  
file_path: mars/mars/oscar/backends/ray/utils.py
imports: import asyncio
  import enum
  import logging
  import os
  import posixpath
  from urllib.parse import urlparse, unquote
  from ....utils import lazy_import, lazy_import_on_load
label_desc: Use image node_id 6 for calling a global function with example usage: node_placement_to_address(pg_name, bundle_index) and returns: str, pg_name, str, bundle_index