code: def testCreateMeshWithEmptyName(self):
      tpu_util.create_tpu_mesh(["x"], [2], "")
  
imports: from tensorflow.dtensor.python import accelerator_util
  from tensorflow.dtensor.python import layout
  from tensorflow.dtensor.python import numpy_util
  from tensorflow.dtensor.python import tpu_util
  from tensorflow.dtensor.python.tests import test_util
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.ops import math_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 24 for calling the DeviceAssignmentTest obj's underlying member method code with example usage: obj.testCreateMeshWithEmptyName() without return types