class DecisionTreeRegressionTrainer extends DecisionTree<MSEImpurityMeasure> {

    public DecisionTreeRegressionTrainer withUsingIdx(boolean usingIdx) {
        this.usingIdx = usingIdx;
        return this;
    }

    public  DecisionTreeRegressionTrainer(int maxDeep, double minImpurityDecrease);
    public  DecisionTreeRegressionTrainer(int maxDeep, double minImpurityDecrease,
        StepFunctionCompressor<MSEImpurityMeasure> compressor);

}