docstr: Let the table determine how to do a lookup on unknown tokens.
docstr_tok: ["Let","the","table","determine","how","to","do","a","lookup","on","unknown","tokens","."]
code: def testWordPieceOpWithInt32IdReturned(self):
      """Let the table determine how to do a lookup on unknown tokens."""
      tokens = ragged_factory_ops.constant(
          [[b"don't", b"tread", b"cantfindme", b"treadcantfindme"]]
      )
      vocab_table = _CreateTable(_ENGLISH_VOCAB, 100)  # OOV values
      self.evaluate(vocab_table.initializer)
      tokenizer = WordpieceTokenizer(
          vocab_table, unknown_token=None, token_out_type=dtypes.int32
      )
      subwords, _, _ = tokenizer.tokenize_with_offsets(tokens)
  
      self.assertAllEqual(subwords, [[[0, 1, 2], [3], [96], [46]]])
      self.assertEqual(subwords.dtype, dtypes.int32)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import parameterized
  from tensorflow.python.compat import compat
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import lookup_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.platform import test
  from tensorflow_text.python.ops.wordpiece_tokenizer import WordpieceTokenizer
label_desc: Use image node_id 4 for calling the WordpieceOpTest obj's underlying member method code with example usage: obj.testWordPieceOpWithInt32IdReturned() without return types