.shap_index
        modelpos.shap_index=self.shap_index

        # save veritas model
        self.veritas_model[&#39;version&#39;]=veritas_version
        self.veritas_model[&#39;model&#39;]=modelpos
        self.veritas_model[&#39;model_neg&#39;]=modelneg
        self.veritas_model[&#39;problem&#39;]=self.problem
        self.veritas_model[&#39;shapvalues&#39;]=shap_values

    else: 

        X=df_test.values.astype(str)
    
        NULLSTR=np.array([&#39;&#39;]*len(model.feature_names))
        s_backg