code: def init_gloo_group(rank: int, world_size: int, group_name: str):
      col.init_collective_group(
          world_size, rank, Backend.GLOO, group_name
      )
      return True
  
file_path: ray/python/ray/util/collective/tests/single_node_cpu_tests/test_gloo_group_isolation.py
imports: from python.ray.util.collective.types import Backend
  import ray
  import ray.util.collective
  import time
label_desc: Use image node_id 2 for calling the Worker obj's underlying member method code with example usage: obj.init_gloo_group(rank, world_size, group_name) and returns: True