code: def report_is_group_initialized(self, group_name="default"):
      is_init = col.is_group_initialized(group_name)
      return is_init
  
imports: import numpy
  import logging
  import ray
  import ray.util.collective
  from ray.util.collective.types import Backend, ReduceOp
  import torch
label_desc: Use image node_id 19 for calling the Worker obj's underlying member method code with example usage: obj.report_is_group_initialized(group_name) and returns: is_init