code: def test_class_method(self):
      class TestClass(object):
          def other_method(self, x):
              return x + 20
  
          def test_method(self, a):
              return self.other_method(a) + 300
  
      tc = TestClass()
      tr, mock = self._transform_with_mock(TestClass.test_method)
  
      self.assertEqual(321, tr(tc, 1))
      self.assertListEqual(mock.calls, [((1,), None)])
  
imports: import imp
  from nvidia.dali._autograph.converters import call_trees
  from nvidia.dali._autograph.converters import functions
  from nvidia.dali._autograph.core import converter_testing
label_desc: Use image node_id 16 for calling the CallTreesTest obj's underlying member method code with example usage: obj.test_class_method() and returns: unknown, unknown