code: def get_placement_group(pg_name):  # pragma: no cover
      return ray.util.get_placement_group(pg_name)
  
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 1 for calling a global function with example usage: get_placement_group(pg_name) and returns: ray