code: def _fullqualname_builtin_py3(obj):
      
  
      if obj.__module__ is not None:
          # built-in functions
          module = obj.__module__
      else:
          # built-in methods
          if inspect.isclass(obj.__self__):
              module = obj.__self__.__module__
          else:
              module = obj.__self__.__class__.__module__
  
      return module + '.' + obj.__qualname__
docs: Fully qualified name for 'builtin_function_or_method' objects in
      Python 3.