<BUG>private final TrainableBundle bundle = new TrainableBundle();public static class ModelParameters extends AbstractRegressor.AbstractModelParameters {</BUG><CONTEXT>import java.util.HashSet;import java.util.Map;import java.util.Set;public class StepwiseRegression extends AbstractRegressor<StepwiseRegression.ModelParameters, StepwiseRegression.TrainingParameters>  {private static final String REG_KEY = "reg";<extra_id_0>private static final long serialVersionUID = 1L;protected ModelParameters(DatabaseConnector dbc) {super(dbc);</CONTEXT>
private final TrainableBundle bundle;public static class ModelParameters extends AbstractRegressor.AbstractModelParameters {