def predict_stop_probs(self, session, intent=False):
        raise NotImplementedError
derivative of transf(f) w.r.t. f
dataset/ETHPy150Open varepsilon/clickmodels/clickmodels/inference.py/ClickModel.predict_stop_probs--crossover with--dataset/ETHPy150Open SheffieldML/GPy/GPy/likelihoods/link_functions.py/GPTransformation.dtransf_df