code: def do_allgather(self, group_name="default"):
      col.allgather(self.list_buffer, self.buffer, group_name)
      return self.list_buffer
  
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 10 for calling the Worker obj's underlying member method code with example usage: obj.do_allgather(group_name) and returns: self