code: def test_cfield_type_flags(self):
      self.assertTrue(
          CField.__flags__ & Py_TPFLAGS_DISALLOW_INSTANTIATION
      )
      self.assertTrue(CField.__flags__ & Py_TPFLAGS_IMMUTABLETYPE)
  
file_path: cpython/Lib/test/test_ctypes/test_struct_fields.py
imports: import unittest
  from ctypes import Structure, Union, sizeof, c_char, c_int
  from ._support import CField, Py_TPFLAGS_DISALLOW_INSTANTIATION, Py_TPFLAGS_IMMUTABLETYPE
label_desc: Use image node_id 8 for calling the StructFieldsTestCase obj's underlying member method code with example usage: obj.test_cfield_type_flags() without return types