code: def test_call(self):
      key = "mysection.myName"
      c = ConfigOption(key)
  
      @c
      def someRandomFunction():
          """Random docstring."""
          pass
  
      self.assertEqual("Random docstring.", c.description)
      self.assertEqual(
          someRandomFunction._get_val_func, c._get_val_func
      )
  
file_path: streamlit/lib/tests/streamlit/config_option_test.py
imports: import unittest
  import pytest
  from parameterized import parameterized
  from streamlit.config_option import ConfigOption, DeprecationError
label_desc: Use image node_id 4 for calling the ConfigOptionTest obj's underlying member method code with example usage: obj.test_call() without return types