code: def testWhitespaceCharacters(self):
      test_value = constant_op.constant(
          [b"things:\tcarpet\rdesk\nlamp\r\nlove"]
      )
      expected_tokens = [
          [b"things:", b"carpet", b"desk", b"lamp", b"love"]
      ]
      expected_offset_starts = [[0, 8, 15, 20, 26]]
      expected_offset_ends = [[7, 14, 19, 24, 30]]
      tokens = self.whitespace_tokenizer.tokenize(test_value)
      self.assertAllEqual(tokens, expected_tokens)
      (
          tokens,
          starts,
          ends,
      ) = self.whitespace_tokenizer.tokenize_with_offsets(test_value)
      self.assertAllEqual(tokens, expected_tokens)
      self.assertAllEqual(starts, expected_offset_starts)
      self.assertAllEqual(ends, expected_offset_ends)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import tensorflow
  import tensorflow_text
  from tensorflow.lite.python import interpreter
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.platform import test
  from tensorflow_text.python.ops.whitespace_tokenizer import WhitespaceTokenizer
label_desc: Use image node_id 13 for calling the WhitespaceTokenizerOpTest obj's underlying member method code with example usage: obj.testWhitespaceCharacters() without return types