public class Line {
    String label;
    List<List<Number>> data;

    public Line(MeasuredOperationList measuredOperations) {
        List<Double> points = measuredOperations.getTotalTime().asDoubleList();
        this.label = measuredOperations.getName();
        this.data = IntStream.range(0, points.size())
            .mapToObj(index -> Arrays.<Number>asList(index, points.get(index)))

        return 1 - new MannWhitneyUTest().mannWhitneyUTest(first.asDoubleArray(), second.asDoubleArray());
    }

    public List<Double> asDoubleList() {
        return stream().map(Amount::getValue).map(BigDecimal::doubleValue).collect(Collectors.toList());
    }

    private double[] asDoubleArray() {