static Expression getResultUpdaterExpression(final RegressionModel.NormalizationMethod normalizationMethod) {
        if (UNSUPPORTED_NORMALIZATION_METHODS.contains(normalizationMethod)) {
            return new NullLiteralExpr();
        } else {
            return getResultUpdaterSupportedExpression(normalizationMethod);
        }
    }
@Test
    void getResultUpdaterExpression() {
        UNSUPPORTED_NORMALIZATION_METHODS.forEach(normalizationMethod -> {
            Expression retrieved =
                    KiePMMLRegressionTableFactory.getResultUpdaterExpression(normalizationMethod);
            assertThat(retrieved).isInstanceOf(NullLiteralExpr.class);
        });
    }