code: def test_clean_paragraphs_empty_string(self):
      result = config_util._clean_paragraphs("")
      self.assertEqual([""], result)
  
imports: import copy
  import re
  import textwrap
  import unittest
  from unittest.mock import patch
  from parameterized import parameterized
  from streamlit import config, config_util
  from streamlit.config_option import ConfigOption
label_desc: Use image node_id 4 for calling the ConfigUtilTest obj's underlying member method code with example usage: obj.test_clean_paragraphs_empty_string() without return types