code: def preserveStaticShape(self):
      rt = ragged_factory_ops.constant([[1, 2], [], [3]])
      rt_s = structure.type_spec_from_value(rt)
      rt_after = structure.from_tensor_list(
          rt_s, structure.to_tensor_list(rt_s, rt)
      )
      self.assertEqual(
          rt_after.row_splits.shape.as_list(),
          rt.row_splits.shape.as_list(),
      )
      self.assertEqual(rt_after.values.shape.as_list(), [None])
  
      st = sparse_tensor.SparseTensor(
          indices=[[3, 4]], values=[-1], dense_shape=[4, 5]
      )
      st_s = structure.type_spec_from_value(st)
      st_after = structure.from_tensor_list(
          st_s, structure.to_tensor_list(st_s, st)
      )
      self.assertEqual(st_after.indices.shape.as_list(), [None, 2])
      self.assertEqual(st_after.values.shape.as_list(), [None])
      self.assertEqual(
          st_after.dense_shape.shape.as_list(),
          st.dense_shape.shape.as_list(),
      )
  
imports: import collections
  import dataclasses
  import functools
  from absl.testing import parameterized
  import numpy
  import wrapt
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.util import nest
  from tensorflow.python.data.util import structure
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import sparse_tensor
  from tensorflow.python.framework import tensor
  from tensorflow.python.framework import tensor_shape
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import tensor_array_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow.python.ops.ragged import ragged_tensor_value
  from tensorflow.python.platform import test
  from tensorflow.python.util.compat import collections_abc
label_desc: Use image node_id 7 for calling the StructureTest obj's underlying member method code with example usage: obj.preserveStaticShape() without return types