code: def scatter_large_data(communicator):
      data = []
      if communicator.rank == 0:
          data = ["test"] * 2000000000
      data = chainermn.scatter_dataset(data, communicator)
      assert len(data) > 0
  
imports: from __future__ import with_statement
  import itertools
  import unittest
  import mpi4py.MPI
  import numpy
  import pytest
  from chainer import testing
  import chainermn
  from chainermn.communicators.flat_communicator import FlatCommunicator
  from chainermn.communicators.naive_communicator import NaiveCommunicator
  import chainerx
label_desc: Use image node_id 1 for calling a global function with example usage: scatter_large_data(communicator) without return types