code: def testIsIndexedSlices(self):
      t = math_ops._as_indexed_slices(
          constant_op.constant([[1.0, 2.0], [0, 0], [3.0, 4.0]])
      )
      self.assertTrue(cross_device_utils.is_indexed_slices(t))
  
imports: from absl.testing import parameterized
  from tensorflow.python.distribute import combinations
  from tensorflow.python.distribute import cross_device_utils
  from tensorflow.python.distribute import device_util
  from tensorflow.python.eager import test
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import indexed_slices
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
label_desc: Use image node_id 6 for calling the IndexedSlicesUtilsTest obj's underlying member method code with example usage: obj.testIsIndexedSlices() without return types