def cache(self):
        return self.clone_into(QuerySet(self._document, self._collection))
Given the derivative of the objective wrt K (dL_dK), compute the derivative wrt X
dataset/ETHPy150Open MongoEngine/mongoengine/mongoengine/queryset/queryset.py/QuerySetNoCache.cache--crossover with--dataset/ETHPy150Open SheffieldML/GPy/GPy/kern/src/stationary.py/Stationary.gradients_X