code: def reduce_scatter(
      self, in_array, out_array, count, op="sum", stream=None
  ):
      pass
  
file_path: cupy/cupyx/distributed/_comm.py
imports: import abc
  from cupyx.distributed import _store
label_desc: Use image node_id 5 for calling the _Backend obj's underlying member method code with example usage: obj.reduce_scatter(in_array, out_array, count, op, stream) without return types