code: def set_victims_to(self, victims_to):
          
          assert victims_to is None or isinstance(victims_to, Cache), \
              "store_to needs to be None or a Cache object."
          assert victims_to is None or victims_to.cl_size == self.cl_size, \
              "cl_size may only increase towards main memory."
          self.victims_to = victims_to
          self.backend.victims_to = victims_to.backend
docs: Update victims_to in Cache and backend.