code: def test_ReplaceSimilarChars(self) -> None:
      aug_chars = txtaugs.ReplaceSimilarChars(
          aug_word_p=0.3, aug_char_p=0.3
      )(self.texts, metadata=self.metadata)
      self.assertTrue(
          aug_chars[0]
          == "The quick brown 'fox' coul|)n't jump 0ver the green, grassy hill."
      )
      self.assertTrue(
          are_equal_metadata(
              self.metadata,
              self.expected_metadata["replace_similar_chars"],
          ),
      )
  
imports: import json
  import os
  import random
  import unittest
  from typing import Any, Dict, List
  from augly import text
  from augly.utils import TEXT_METADATA_PATH
label_desc: Use image node_id 16 for calling the TransformsTextUnitTest obj's underlying member method code with example usage: obj.test_ReplaceSimilarChars() without return types