code: def test_subclasses_c_wchar_p(self):
      from ctypes import c_wchar_p
  
      class CWCHARP(c_wchar_p):
          def from_param(cls, value):
              return value * 3
  
          from_param = classmethod(from_param)
  
      self.assertEqual(CWCHARP.from_param("abc"), "abcabcabc")
  
file_path: catboost/contrib/tools/python/src/Lib/ctypes/test/test_parameters.py
imports: import unittest, sys
  from ctypes.test import need_symbol
  import test.support
label_desc: Use image node_id 4 for calling the SimpleTypesTestCase obj's underlying member method code with example usage: obj.test_subclasses_c_wchar_p() and returns: unknown