code: def test_references(self):
      # B is not exposed to Python
      a = getBCppObj()
      self.assertEqual(type(a), A)
  
      # C is exposed to Python
      c = getCCppObj()
      self.assertEqual(type(c), C)
  
file_path: turicreate/src/external/boost/boost_1_68_0/libs/python/test/polymorphism.py
imports: import unittest
  from polymorphism_ext import *
label_desc: Use image node_id 2 for calling the PolymorphTest obj's underlying member method code with example usage: obj.test_references() without return types