code: def setUp(self):
      super(CollectiveTest, self).setUp()
  
      global_ids = test_util.create_device_ids_array((2, 1))
      local_ids = np.ravel(global_ids).tolist()
      mesh_dict = {
          device: layout_lib.Mesh(
              _MESH_DIMS,
              global_ids,
              local_ids,
              test_util.create_device_list((2, 1), device),
          )
          for device in ("CPU", "GPU", "TPU")
      }
      self.mesh = self.configTestMesh(mesh_dict)
      self.fully_replicated_layout_2d = Layout.replicated(
          self.mesh, rank=2
      )
      self.first_dimension_sharded_layout_2d = Layout.batch_sharded(
          self.mesh, _MESH_DIM_X, 2
      )
      self.scalar_layout = Layout.replicated(self.mesh, rank=0)
  
imports: import os
  from absl.testing import parameterized
  import numpy
  from tensorflow.dtensor.python import api
  from tensorflow.dtensor.python import config
  from tensorflow.dtensor.python import d_variable
  from tensorflow.dtensor.python import dtensor_device
  from tensorflow.dtensor.python import layout
  from tensorflow.dtensor.python.tests import test_backend_util
  from tensorflow.dtensor.python.tests import test_util
  from tensorflow.python.eager.polymorphic_function import polymorphic_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gen_array_ops
  from tensorflow.python.ops import gen_math_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the CollectiveTest obj's underlying member method code with example usage: obj.setUp() without return types