@if_delegate_has_method(delegate='estimator')
    def decision_function(self, X):
        return self.best_estimator_.decision_function(X)
A score for a user and item that method predicts.
dataset/ETHPy150Open scikit-learn/scikit-learn/sklearn/grid_search.py/BaseSearchCV.decision_function--crossover with--dataset/ETHPy150Open grafos-ml/test.fm/src/testfm/okapi/connector.py/BaseOkapiModel.get_score