code: def testIdToStringRagged(self):
      sp = SentencepieceTokenizer(self.model)
      pieces = _utf8(
          [
              [
                  ["▁I", "▁l", "o", "ve", "▁c", "ar", "pe", "t"],
                  ["▁I", "▁l", "o", "ve", "▁desk", "."],
                  ["▁I", "▁l", "o", "ve", "▁l", "amp", "."],
              ],
              [
                  [
                      "▁",
                      "N",
                      "ever",
                      "▁tell",
                      "▁me",
                      "▁the",
                      "▁",
                      "o",
                      "d",
                      "d",
                      "s",
                  ]
              ],
          ]
      )
      ids = [
          [
              [9, 169, 21, 125, 78, 48, 132, 15],
              [9, 169, 21, 125, 727, 6],
              [9, 169, 21, 125, 169, 579, 6],
          ],
          [[4, 199, 363, 310, 33, 7, 4, 21, 17, 17, 8]],
      ]
      result = sp.id_to_string(
          ragged_factory_ops.constant(ids, dtypes.int32)
      )
      self.assertAllEqual(pieces, result)
  
imports: import sys
  import tempfile
  from absl.testing import parameterized
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.eager import context
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.framework import test_util
  from tensorflow.python.lib.io import file_io
  from tensorflow.python.module import module
  from tensorflow.python.ops import gen_experimental_dataset_ops
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_gather_ops
  from tensorflow.python.platform import gfile
  from tensorflow.python.platform import test
  from tensorflow.python.saved_model import load
  from tensorflow.python.saved_model import save
  from tensorflow_text.python.ops.sentencepiece_tokenizer import SentencepieceTokenizer
label_desc: Use image node_id 7 for calling the SentencepieceTokenizerOpTest obj's underlying member method code with example usage: obj.testIdToStringRagged() without return types