def setUpClass(self):
        """
        Set up the unit test by loading the dataset and training a model.
        """
        scikit_data = load_boston()
        scikit_model = DecisionTreeRegressor(random_state=1)
        scikit_model.fit(scikit_data["data"], scikit_data["target"])

        # Save the data and the model
        self.scikit_data = scikit_data
        self.scikit_model = scikit_model

        Set up the unit test by loading the dataset and training a model.
        
coremltools/test/xgboost_tests/test_decision_tree_regression.py