code: def test_text_2_tokens(self):
      tokenizer = RegExTokenizer(regex=DEFAULT_REGEX)
  
      tokens = tokenizer.text_to_tokens("Zc")
      assert "".join(tokens) == "Zc"
  
file_path: NeMo/tests/collections/nlp/test_regex_tokenizer.py
imports: import tempfile
  import pytest
  from nemo.collections.common.tokenizers.regex_tokenizer import RegExTokenizer
label_desc: Use image node_id 3 for calling the TestRegexTokenizer obj's underlying member method code with example usage: obj.test_text_2_tokens() without return types