code: def do_reducescatter(self, group_name="default", op=ReduceOp.SUM):
      col.reducescatter(self.buffer, self.list_buffer, group_name, op)
      return self.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 11 for calling the Worker obj's underlying member method code with example usage: obj.do_reducescatter(group_name, op) and returns: self