def _close_gap(self, size, target, tree_id):
        self._manage_space(-size, target, tree_id)
Returns K-vector gradient of unconstrained objective function
dataset/ETHPy150Open agiliq/django-socialnews/socialnews/mptt/managers.py/TreeManager._close_gap--crossover with--dataset/ETHPy150Open daeilkim/refinery/refinery/bnpy/bnpy-dev/bnpy/allocmodel/admix/OptimizerForHDPPE.py/objGrad_c