def get_real_instance(self):
        real_model = self.get_real_instance_class()
        if real_model == self.__class__:
            return self
        return real_model.objects.get(pk=self.pk)
Method clears data when we call new search() or new distance() method.
dataset/ETHPy150Open chrisglass/django_polymorphic/polymorphic/models.py/PolymorphicModel.get_real_instance--crossover with--dataset/ETHPy150Open slawek87/geolocation-python/geolocation/managers.py/Manager.clear