code: def testCreateMeshWithNegativeRingDims(self):
      mesh = tpu_util.create_tpu_mesh(
          ["x", "y", "z"],
          [1, 2, 1],
          "mesh_with_negative_ring_dims",
          ring_dims=-2,
      )
      self.assertAllEqual(mesh.shape(), [1, 2, 1])
      self.assertEqual(mesh.num_local_devices(), 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 19 for calling the DeviceAssignmentTest obj's underlying member method code with example usage: obj.testCreateMeshWithNegativeRingDims() without return types