code: def testRaggedStack(
      self,
      descr,
      rt_inputs,
      axis,
      expected,
      ragged_ranks=None,
      expected_ragged_rank=None,
      expected_shape=None,
  ):
      if ragged_ranks is None:
          ragged_ranks = [None] * len(rt_inputs)
      rt_inputs = [
          ragged_factory_ops.constant(
              rt_input, ragged_rank=rrank
          )  # pylint: disable=g-long-ternary
          if rrank != 0
          else constant_op.constant(rt_input)
          for (rt_input, rrank) in zip(rt_inputs, ragged_ranks)
      ]
      stacked = ragged_concat_ops.stack(rt_inputs, axis)
      if expected_ragged_rank is not None:
          self.assertEqual(stacked.ragged_rank, expected_ragged_rank)
      if expected_shape is not None:
          self.assertEqual(stacked.shape.as_list(), expected_shape)
      self.assertAllEqual(stacked, expected)
  
file_path: tensorflow/tensorflow/python/ops/ragged/ragged_stack_op_test.py
imports: from absl.testing import parameterized
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops.ragged import ragged_concat_ops
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 1 for calling the RaggedStackOpTest obj's underlying member method code with example usage: obj.testRaggedStack(descr, rt_inputs, axis, expected, ragged_ranks, expected_ragged_rank, expected_shape) without return types