@Test(invocationCount = 5)
  public void toDouble2_long() {
    final Random random = new LCG64ShiftRandom();
    final Histogram<Double> histogram = Histogram.ofDouble(0.0, 1.0, 15);

    for (int i = 0; i < 100000; ++i) {
      histogram.accept(toDouble2(random.nextLong()));
    }

    assertUniformDistribution(histogram);
  }
  @Test(invocationCount = 5)
  public void toDouble_int_int() {
    final Random random = new LCG64ShiftRandom();
    final Histogram<Double> histogram = Histogram.ofDouble(0.0, 1.0, 15);

    for (int i = 0; i < 100000; ++i) {
      final long value = random.nextLong();
      histogram.accept(toDouble((int) (value >>> 32), (int) value));
    }

    assertUniformDistribution(histogram);
  }