docs: def _build_superclass_lists(self):
          """
          >>> CodeBaseDoc(['examples']).all_classes['MySubClass'].all_superclasses[0].name
          'MyClass'
          """
          cls_dict = self.all_classes
          for cls in list(cls_dict.values()):
              cls.all_superclasses = []
              superclass = cls.superclass
              try:
                  while superclass:
                      superclass_obj = cls_dict[superclass]
                      cls.all_superclasses.append(superclass_obj)
                      superclass = superclass_obj.superclass
              except KeyError:
                  print("Missing superclass: " + superclass)