class_docstr: Test the config system.
class_docstr_tok: ["Test","the","config","system","."]
code: def test_check_conflicts_browser_serverport(self):
      config._set_option("global.developmentMode", True, "test")
      config._set_option("browser.serverPort", 1234, "test")
      with pytest.raises(AssertionError) as e:
          config._check_conflicts()
      self.assertEqual(
          str(e.value),
          "browser.serverPort does not work when global.developmentMode is true.",
      )
  
imports: import copy
  import os
  import textwrap
  import unittest
  from unittest.mock import MagicMock, mock_open, patch
  import pytest
  from parameterized import parameterized
  from streamlit import config, env_util
  from streamlit.config_option import ConfigOption
  from streamlit.errors import StreamlitAPIException
label_desc: Use image node_id 22 for calling the ConfigTest obj's underlying member method code with example usage: obj.test_check_conflicts_browser_serverport() without return types