code: def test_InsertZeroWidthChars(self) -> None:
      aug_unicode_text = txtaugs.InsertZeroWidthChars(
          "all", 1.0, False
      )(self.texts, metadata=self.metadata)
  
      # Separator inserted between every character (including spaces/punctuation).
      # Renders as: "T‌h‌e‌ ‌q‌u‌i‌c‌k‌ ‌b‌r‌o‌w‌n‌ ‌'‌f‌o‌x‌'‌ ‌c‌o‌u‌l‌d‌n‌'‌t‌ ‌j‌u‌m‌p‌ ‌o‌v‌e‌r‌ ‌t‌h‌e‌ ‌g‌r‌e‌e‌n‌,‌ ‌g‌r‌a‌s‌s‌y‌ ‌h‌i‌l‌l‌."
      self.assertEqual(
          aug_unicode_text,
          [
              "T\u200ch\u200ce\u200c \u200cq\u200cu\u200ci\u200cc\u200ck\u200c "
              "\u200cb\u200cr\u200co\u200cw\u200cn\u200c \u200c'\u200cf\u200co"
              "\u200cx\u200c'\u200c \u200cc\u200co\u200cu\u200cl\u200cd\u200cn"
              "\u200c'\u200ct\u200c \u200cj\u200cu\u200cm\u200cp\u200c \u200co"
              "\u200cv\u200ce\u200cr\u200c \u200ct\u200ch\u200ce\u200c \u200cg"
              "\u200cr\u200ce\u200ce\u200cn\u200c,\u200c \u200cg\u200cr\u200ca"
              "\u200cs\u200cs\u200cy\u200c \u200ch\u200ci\u200cl\u200cl\u200c."
          ],
      )
      self.assertTrue(
          are_equal_metadata(
              self.metadata,
              self.expected_metadata["insert_zero_width_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 12 for calling the TransformsTextUnitTest obj's underlying member method code with example usage: obj.test_InsertZeroWidthChars() without return types