code: def testConstant(self):
      constant = mtf.Constant(
          self.mesh, 0, self.ab_shape, dtype=tf.int32
      )
      self.assertEqual(constant.splittable_dims, frozenset(["a", "b"]))
      self.assertEqual(constant.unsplittable_dims, frozenset())
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import parameterized
  import mesh_tensorflow
  from mesh_tensorflow import test_utils
  import numpy
  import tensorflow.compat.v1
  from tensorflow.python.framework import test_util
label_desc: Use image node_id 22 for calling the OperationSplittabilityTest obj's underlying member method code with example usage: obj.testConstant() without return types