code: def test_ReplaceUpsideDown(self) -> None:
      aug_upside_down_text = txtaugs.ReplaceUpsideDown()(
          self.texts, metadata=self.metadata
      )
  
      self.assertTrue(
          aug_upside_down_text[0]
          == "˙llᴉɥ ʎssɐɹɓ 'uǝǝɹɓ ǝɥʇ ɹǝʌo dɯnɾ ʇ,uplnoɔ ,xoɟ, uʍoɹq ʞɔᴉnb ǝɥꞱ"
      )
      self.assertTrue(
          are_equal_metadata(
              self.metadata,
              self.expected_metadata["replace_upside_down"],
          ),
      )
  
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 19 for calling the TransformsTextUnitTest obj's underlying member method code with example usage: obj.test_ReplaceUpsideDown() without return types