code: def test_debugger_set_trace(self):
      tracking_list = []
  
      pdb = types.ModuleType("fake_pdb")
      pdb.set_trace = lambda: tracking_list.append(1)
  
      def f():
          return pdb.set_trace()
  
      tr, _ = self._transform_with_mock(f)
  
      tr()
      self.assertListEqual(tracking_list, [1])
  
imports: import types
  from tensorflow.python.autograph.converters import call_trees
  from tensorflow.python.autograph.converters import functions
  from tensorflow.python.autograph.core import converter_testing
  from tensorflow.python.platform import test
label_desc: Use image node_id 15 for calling the CallTreesTest obj's underlying member method code with example usage: obj.test_debugger_set_trace() and returns: pdb