ertainty: bool = False, group_by: list = None):
        &#34;&#34;&#34;Predicts args using `_apply_func`&#34;&#34;&#34;
        if not self._fitted:
            raise AttributeError(&#34;Please fit the Vset object before calling predict.&#34;)
        pred_dict = {}
        for k, v in self.fitted_vfuncs.items():
            if hasattr(v, &#34;predict&#34;):
                pred_dict[k] = v.predict
        preds = self._apply_func(*args, out_dict=pred_dict)
        if with_uncertainty:
            return pr