code: def test_create_mnbn_model_chain_list_gpu(self):
      self.check_create_mnbn_model_chain_list(
          use_gpu=True, use_chx=False
      )
      self.check_create_mnbn_model_chain_list(
          use_gpu=True, use_chx=True
      )
  
imports: import unittest
  import chainer
  import chainer.testing
  import chainer.testing.attr
  import chainermn
  from chainermn.testing.device import get_device
label_desc: Use image node_id 9 for calling the TestCreateMnBnModel obj's underlying member method code with example usage: obj.test_create_mnbn_model_chain_list_gpu() without return types