def add_if_changed(self, resource):
        if (resource.change is not None):
            self.resources.append(resource)    
        else:
            raise ChangeTypeError(resource.change)
Lazy client connection property.
dataset/ETHPy150Open resync/resync/resync/change_list.py/ChangeList.add_if_changed--crossover with--dataset/ETHPy150Open niwinz/django-redis/django_redis/cache.py/RedisCache.client