def gradient(self, x, Y):
        pass
Get the query builder for a delete operation on the pivot.
dataset/ETHPy150Open karlnapf/kameleon-mcmc/kameleon_mcmc/kernel/HypercubeKernel.py/HypercubeKernel.gradient--crossover with--dataset/ETHPy150Open sdispater/orator/orator/orm/relations/pivot.py/Pivot._get_delete_query